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Showing posts with label Physics Quiz. Show all posts
Showing posts with label Physics Quiz. Show all posts

Wednesday, May 1, 2013

Of the following answers, which is the frequency closest to middle-C on a piano?


Q-1: Of the following answers, which is the frequency closest to middle-C on a piano?
1) 20
2) 256
3) 2520
4) 25200
ANSWER: 2 -- 256
Q-2: The non-relativistic mass of an object
1) must be the same as its weight
2) depends on where you measure it
3) does not change with increasing velocity
4) is greatest at the poles
ANSWER: 3 -- DOES NOT CHANGE WITH INCREASING VELOCITY
Q-3:A ball is thrown horizontally from the top of a cliff. Assuming no air resistance, the acceleration of the ball while it is in flight is:
1) in the vertical direction only
2) in the horizontal direction only
3) in the vertical and horizontal directions
4) zero.
ANSWER: 1 -- IN THE VERTICAL DIRECTION ONLY
Q-4:While traveling in a straight line, a car uniformly changes its speed from 50 kilometers per hour to 110 kilometers per hour in 5 seconds. The acceleration of the car during this time is:
1) 5 kilometers per hour per second
2) 12 kilometers per hour per second
3) 50 kilometers per hour per second
4) 60 kilometers per hour per second
ANSWER: 2 -- 12 KILOMETERS PER HOUR PER SECOND
Q-5: If there is to be a change in velocity, there MUST be a change in
1) speed only
2) direction only
3) either speed or direction
4) both speed and direction
ANSWER: 3 -- EITHER SPEED OR DIRECTION
Q-6: Susan pushes against a 100 kilogram rock with a force of 5 Newtons, but the rock doesn't move. The force the rock exerts on Susan is
1) 0 Newtons
2) 5 Newtons
3) 20 Newtons
4) 100 Newtons
ANSWER: 2 -- 5 NEWTONS

As a source of sound approaches a stationary listener, the apparent wavelength:


Q-1: As a source of sound approaches a stationary listener, the apparent wavelength:
1) increases
2) decreases
3) stays the same.
ANSWER: 3 -- DECREASES
Q-2:  The particle nature of light is demonstrated by which of the following?
1) the photoelectric effect
2) the various colors of light
3) the speed of light
4) diffraction.
ANSWER: 1 -- THE PHOTOELECTRIC EFFECT
Q-3: A wavelength is commonly measured in which one of the following units?
1) radians
2) angstroms
3) electron volts
4) seconds
ANSWER: 2 -- ANGSTROMS
Q-4:  Which of the following three nuclear radiations is the most penetrating?
1) alpha
2) beta
3) gamma
ANSWER: 3 -- GAMMA
Q-5: An electrical current in a superconducting ring will theoretically flow unchanged for:
1) several milliseconds
2) a second
3) several weeks
4) forever
ANSWER: 4 -- FOREVER
Q-6: What three colors form the picture in a color tv?
ANSWER: RED GREEN BLUE
Q-7:  What is the name of the process whereby waves travel around corners and obstacles in their paths?
ANSWER: DIFFRACTION
Q-8:  The physicist Chadwick is known for his association with:
1) the alpha particle
2) the neutron
3) the cloud chamber
4) the electron
ANSWER: 2 -- THE NEUTRON
Q-9: A color with a wavelength longer than that of yellow is:
1) red
2) blue
3) violet
4) green
ANSWER: 1 -- RED
Q-10:  The knot is a nautical measure of:
1) length
2) speed
3) acceleration
4) displacement
ANSWER: 2 -- SPEED
Q-11: Assuming constant gravity and no air resistance, the path of a cannonball fired from a cannon is:
1) a semi-circle
2) an ellipse
3) a parabola
4) a hyperbola
ANSWER: 3 -- A PARABOLA
Q-12:  As you go up a mountain top, your weight:
1) increases slightly
2) decreases slightly
3) remains exactly the same.
ANSWER: 2 -- DECREASES SLIGHTLY
Q-13:  The shape of a magnetic field around a long straight current carrying wire is:
1) elliptical.
2) square
3) varies depending on the magnitude of the current
4) circular
ANSWER: 4 -- CIRCULAR
Q-14: What number represents the ratio of speed of an object to the speed of sound in the surrounding air?
ANSWER: MACH NUMBER

A beam of light is incident on a perfectly smooth body of water. The angle that the REFLECTED ray makes with the normal is:


Q-1: A beam of light is incident on a perfectly smooth body of water. The angle that the REFLECTED ray makes with the normal is:
1) greater than
2) smaller than
3) the same as the angle the incident ray makes with the normal.
ANSWER: 3 -- THE SAME AS
Q-2:  A beam of light is incident on a large block of glass. The index of refraction of the glass is greater than one. Is the wavelength of the light in the glass:
1) longer than
2) shorter than
3) the same as the wavelength of the light in the air?
ANSWER: 2 -- SHORTER THAN
Q-3: The focal length of a concave mirror is 2 meters. An object is positioned 8 meters in front of the mirror. Is the image of this object real or virtual?
ANSWER: REAL
Q-4:  A converging thin lens has a focal length of 27 centimeters. An object is placed 9 centimeters from the lens. Is the image of the object real or virtual?
ANSWER: VIRTUAL
Q-5:  Light has wavelength, frequency, and speed. Which, if any, of these quantities remains unchanged when light passes from a vacuum into a block of glass?
ANSWER: FREQUENCY
Q-6:  Which of the following waves is not a transverse wave?
1) a wave traveling on a string
2) an electromagnetic wave
3) a sound wave
ANSWER: 3 -- A SOUND WAVE
Q-7:  Assume that a ray of light passes from glass into air at an angle of incidence greater than zero degrees. Will the ray of light be bent toward or away from the normal as it passes into the air?
ANSWER: AWAY FROM
Q-8: If one looks at a point P on the bottom of a swimming pool, one sees an image point P prime. Is the image point, P prime, a real or a virtual image?
ANSWER: VIRTUAL
Q-9:  A real image can be formed by which of the following single mirrors?
1) a plane mirror
2) a concave spherical mirror
3) a convex spherical mirror
ANSWER: 2 -- A CONCAVE SPHERICAL MIRROR
Q-10:  If two different gases have the same volume, temperature, and pressure and behave like ideal gases, they will also be identical in which one of the following ways?
1) average molecular velocity
2) total mass
3) total molecular kinetic energy
4) average momentum per molecule
ANSWER: 3 -- TOTAL MOLECULAR KINETIC ENERGY
Q-11:  The frequency of a wave is 2/10 Hertz. What is the period of thiswave?
ANSWER: 5 SECONDS

Who received the Nobel Prize in Physics in 1923 for his experiment which measured the charge of the electron. The experiment consisted of allowing drops of oil which had become charged to fall in an electric field.


Q-1: Who received the Nobel Prize in Physics in 1923 for his experiment which measured the charge of the electron. The experiment consisted of allowing drops of oil which had become charged to fall in an electric field.
ANSWER: (ROBERT ANDREWS) MILLIKAN
Q-2:  Who received the Nobel Prize in Physics in 1922 for his theory which predicted the electron orbits of the Hydrogen atom?
ANSWER: (NIELS) BOHR
Q-3: Who was the first female to be awarded the Nobel Prize in Physics?
ANSWER: MARIE SKLOWDOWSKA-CURIE or MADAM CURIE
Q-4:  A current of 6 amperes flows through a 2 ohm resistor for 30 seconds. How many coulombs of charge have passed through the resistor?
ANSWER: 180 COULOMBS
Q-5: The potential difference across a 4 ohm resistor is 20 volts. What is the current in the resistor?
ANSWER: 5 AMPS
Q-6:  At a point directly east of a negative point charge, the electric field points in what direction?
ANSWER: WEST
Q-7: The temperature of a gas is held constant while its volume is reduced. The pressure the gas exerts on the walls of its container increases because its molecules:
1) strike the container walls more often
2) strike the container walls with higher speeds
3) strike the container walls with greater force
4) all of the above
ANSWER: 1 -- STRIKE THE CONTAINER WALLS MORE OFTEN
Q-8:  The electric field of a point charge varies:
1) linearly with distance and inversely with charge
2) linearly with distance and inversely with charge squared
3) linearly with charge and inversely with distance squared
4) linearly with charge and inversely with distance
ANSWER:4 -- LINEARLY WITH CHARGE AND INVERSELY WITH DISTANCE
Q-9: A two farad and a four farad capacitor are connected in parallel. What single capacitance is "equivalent" to this combination?
ANSWER: 6 FARADS
Q-10:  A current of 5 amps passes through a 10 ohm resistor. What power is dissipated by this resistor under these conditions?
ANSWER: 250 WATTS
Q-11:  Is the filament resistance lower or higher in a 500 watt light bulb than in a 100 watt light? Assume that both bulbs have been designed to operate at 110 volts.
ANSWER: LOWER
Q-12:  A five ohm and a ten ohm resistor are connected in parallel, what single resistance is "equivalent" to this combination?
ANSWER: 3 AND 1/3 OHM
Q-13:  Three resistors which have different values are connected in series. Which one of the following statements is correct?
1) The potential drop across all three resistors is the same.
2) The same current passes through all three resistors.
3) The same power is dissipated by all three resistors.
ANSWER: 2 -- THE SAME CURRENT PASSES THROUGH ALL THREE
RESISTORS.

Newton's first law is often referred to as which of the following?


Q-1: Newton's first law is often referred to as which of the following?
1) The law of straight-line motion.
2) The law of momentum
3) The law of inertia
4) F = ma (Spell out M-A)
ANSWER: 3 -- THE LAW OF INERTIA
Q-2: The statement, "In regions where fluid velocity is smaller, the pressure is higher, and vice versa", is known as the principle of:
1) Pascal
2) Bernoulli
3) Torricelli
4) Archimedes
ANSWER: 2 -- BERNOULLI
Q-3: Relative to its period on the earth, is the period of a pendulum on the moon:
1) shorter
2) longer
3) remain unchanged
ANSWER: 2 -- LONGER
Q-4: Two bodies each have a mass 'M'. If the mass of each body is doubled, the force of attraction between the two bodies is:
1) twice the original force
2) 1/4 the original force
3) 4 times the original force
4) unchanged
ANSWER: 3 -- 4 TIMES THE ORIGINAL FORCE
Q-5: An object in equilibrium always has zero:
1) velocity
2) momentum
3) mass
4) acceleration.
ANSWER: 4 -- ACCELERATION
Q-6:Which of the following is NOT an SI unit of measure?
1) watt
2) newton
3) joule
4) erg
5) second
ANSWER: 4 -- ERG
Q-7: A body which is attached to a spring undergoes simple harmonic motion. The magnitude of the body's acceleration is:
1) constant
2) proportional to its displacement from its equilibrium position
3) zero
4) always increasing.
ANSWER: 2 -- PROPORTIONAL TO ITS DISPLACEMENT FROM ITS
EQUILIBRIUM POSITION
Q-8: If the resultant force acting on a body of constant mass is zero, the body's acceleration is:
1) increasing
2) decreasing
3) always zero
4) negative.
ANSWER: 3 -- ALWAYS ZERO
Q-9:What is the name of the Scottish physicist who developed the mathematical explanation of the theory of light?
ANSWER: (JAMES CLERK) MAXWELL

What kind of particles will be accelerated in the Superconducting Super Collider?


Q-1: What kind of particles will be accelerated in the Superconducting Super Collider?
ANSWER: PROTONS
Q-2:  The Superconducting Super Collider will produce collisions with an energy of:
1) 40 joules
2) 40 MeV
3) 40 TeV
4) 200 TeV
ANSWER: 3 -- 40 TeV
Q-3: Superconducting materials are being used in the Superconducting Super Collider to:
1) cool the particles.
2) minimize electrical power consumption.
3) maximize the acceleration potentials.
4) provide radiation shielding.
ANSWER: 2 -- MINIMIZE ELECTRICAL POWER CONSUMPTION.
Q-4:  One of the particles expected to be discovered at the Superconducting Super Collider is the:
1) Higg's boson.
2) tau meson.
3) tachyon.
4) anti-proton.
ANSWER: 1 -- HIGG'S BOSON.
Q-5:  For a parallel connection of light bulbs, which of the following statements is correct?
1) The resistance of each light bulb must be the same.
2) If one goes out they all go out.
3) Each of the light bulbs operates independently.
ANSWER: 3 -- EACH OF THE LIGHT BULBS OPERATES INDEPENDENTLY.
Q-6:  Which of the following pair are vector quantities?
1) time and space
2) force and momentum
3) energy and time
4) momentum and mass
e) mass
ANSWER: 3 -- FORCE and MOMENTUM
Q-7: A force of 15 newtons is acting on an object which has a mass of 3 kilograms. If this is the only force acting on the object, what is the acceleration of the object?
ANSWER: 5 METERS PER SECOND SQUARED
Q-8:  An object with a mass of 5 kilograms is a distance of 5 meters above the surface of the earth. If the acceleration due to gravity is 10 meters per second squared, the potential energy of the object relative to the surface of the earth is:
1) 10 joules
2) 20 joules
3) 100 joules
4) 250 joules
5) none of the above
ANSWER: 4 -- 250 JOULES
Q-9: For a body to be in equilibrium, which of the following conditions must exist?
1) no forces may be acting on the body.
2) the body must be accelerating.
3) the velocity of the body must be zero.
4) the sum of the forces acting on the body must be equal to zero.
ANSWER: 4 -- THE SUM OF THE FORCES ACTING ON THE BODY MUST BE
EQUAL TO ZERO.

A 50 millimeter focal length camera lens photographs a 4 meter tall tree at a distance of 20 meters. How tall is the image of the tree?


Q-1: A 50 millimeter focal length camera lens photographs a 4 meter tall tree at a distance of 20 meters. How tall is the image of the tree?
ANSWER: 10 MILLIMETERS
Q-2:What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)?
1) Paraboloid
2) Ellipsoid
3) spherical
4) Hyperboloid
ANSWER: 1 -- PARABOLOID
Q-3:The dominant charge carriers in p-type semiconductors are:
1) neutrons
2) electrons
3) protons
4) holes
ANSWER: 4 -- HOLES
Q-4:Imagine that a 20 mile diameter hole is bored along the diameter of the Earth extending from the North Pole to the South Pole, that all air and gases are pumped out of this hole, and that the temperature throughout this hole is maintained at 300 Kelvins. A boy throws a ping pong ball into this hole. The ping pong ball would:
1) fall to the center of the Earth and remain forever suspended there.
2) fall to the opposite side of the Earth's surface and remain forever suspended there.
3) forever oscillate in simple harmonic motion along the hole between the loci of the hole
with the opposite surfaces of the Earth.
4) none of the above.
ANSWER: 3 -- FOREVER OSCILLATE IN SIMPLE HARMONIC MOTION ALONG THE OLE
Q-5: An automobile needs an antenna for its radio to play properly because:
1) the automobile's tires insulate it from the ground.
2) the automobile's body acts as a Faraday cage.
3) when the automobile moves, the velocity of the radio signal appears changed with
respect to when it is at rest.
4) the transmitter also uses an antenna.
ANSWER: 2 -- THE AUTOMOBILE'S BODY ACTS AS A FARADAY CAGE.
Q-6:Name any THREE of the four elements that are ferromagnetic at room temperature (25 degrees Celsius).
ANSWER: IRON (FE); COBALT (CO); NICKEL (NI); GADOLINIUM GD)
Q-7: Estimate the number of atoms comprising a silicon chip that is 0.2 millimeters by 0.2 millimeters by 0.1 millimeters, given that the density of silicon is 2.34 grams per cubic centimeter, the number of atoms in a gram-weight is approximately 6 x 1023 atoms, and the atomic weight of silicon is 28:
ANSWER: 2 x 1017
Q-8:A man picks up a 50 kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block?
1) 1,000 joules
2) 750 joules
3) 500 joules
4) 0 joules
ANSWER: 4 -- 0 JOULES
Q-9: What is the atomic number of Antimony?
1) 33
2) 51
3) 85
4) 122
ANSWER: 3 -- 51

Planck's constant was first introduced in order to obtain a correct theoretical prediction of:


Q-1: Planck's constant was first introduced in order to obtain a correct theoretical prediction of:
1) the distribution of frequencies occurring in black body radiation.
2) the energy produced by the transformation of mass into energy.
3) the speed of light.
4) lifetime of the neutron.
ANSWER: 1 -- THE DISTRIBUTION OF FREQUENCIES OCCURRING IN BLACK BODY RADIATION
Q-2: The theory which ascribes wave-like properties to particles is called:
1) general relativity
2) quantum mechanics
3) special relativity
4) classical mechanics
ANSWER: 2-- QUANTUM MECHANICS
Q-3: The magnitude of the quarks' electric charge is:
1) zero.
2) greater than the electron's charge.
3) equal to the electron's charge.
4) less than the electron's charge.
ANSWER: 4 -- LESS THAN THE ELECTRON'S CHARGE.
Q-5:What important property of light is demonstrated by the photoelectric effect?
ANSWER: PARTICLE NATURE OF LIGHT
Q-6:The magnetic pressure of a 0.5 Tesla field is about one atmosphere. What is the pressure of a 4 Tesla field?
ANSWER: 64 ATMOSPHERES (PROPORTIONAL TO B2)
Q-7:Weather satellites transmit cloud cover and temperature-humidity profiles back to Earth using images of which combination of the electromagnetic radiation types?
1) infra-red and visible light
2) ultraviolet and nuclear magnetic
3) ultraviolet and infra-red
4) ultraviolet and visible light
ANSWER: 1 -- INFRA-RED AND VISIBLE LIGHT
Q-8:In a nuclear power reactor, fission produces heat which is used to produce electricity. A reactor producing more fissionable material than it consumes is known as what kind of reactor?
ANSWER: BREEDER REACTOR
Q-9:Processes which occur without the addition or withdrawal of heat from the surrounding are called what?
ANSWER: ADIABATIC
Q-10:The velocity of a ball tossed vertically into the air is expressed by the equation v(t) = -32t + 4, where t is given in seconds. Give the velocity of the ball when it reaches its highest point.
ANSWER: 0
Q-11:An object is located 1 meter in front of a converging lens having a focal length of 20 centimeters. At what distance behind the lens (whose thickness is negligible) will the image be formed?
1) 18 centimeters
2) 20 centimeters
3) 22 centimeters
4) 25 centimeters
ANSWER: 4 -- 25 CENTIMETERS

What is the theoretical limit of the efficiency of a single-crystal single-junction cell in a photovoltaic system?


Q-1: What is the theoretical limit of the efficiency of a single-crystal single-junction cell in a photovoltaic system?
1) 9 percent
2) 29 percent
3) 79 percent
4) 99 percent
ANSWER: 2 -- 29 PERCENT
Q-2:  What is the ideal efficiency of a reversible heat engine cyclically operating between a source temperature of 600 degrees Kelvin and a sink temperature of 150 degrees Kelvin?
ANSWER: 75 PERCENT
Q-3:  A four cycle internal combustion automobile engine operates on what kind of cycle?
1) Rankine
2 Otto
3) Brayton
4) Joule
ANSWER: 2 -- OTTO
Q-4:  If materials become superconducting when cooled, any magnetic field will be expelled. This is called:
1) diamagnetism
2) repulsion
3) the Landow Effect
4) the Meissner effect
ANSWER:4 -- THE MEISSNER EFFECT
Q-5:  A kilogram of water goes from 90 degrees Celsius to 10 degrees Celsius in a period of 2 hours. If the specific heat of water is 4 kilojoules per kilogram per degree Celsius, how much heat has the water lost?
ANSWER: 320 KILOJOULES or 320,000 JOULES
Q-6:  What is the total resistance of three 15-ohm resistors connected in parallel?
ANSWER: 5 OHMS
Q-7: A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be:
1) the same
2) 2 times
3) 4 times
4) 8 times
ANSWER: 2 -- 2 TIMES
Q-8:  Pendulum "A" swings through one complete oscillation in one second. If Pendulum "B" is four times as long as Pendulum "A", how long does it take Pendulum "B" to swing through one complete oscillation?
ANSWER: 2 SECONDS
Q-10: An electric clothes dryer is connected to a 100-volt source. How much current does it use if it requires 2,000 watts of electric power?
ANSWER: 20 AMPERES
Q-11:  The actual mechanical advantage of a block and tackle is 5. The ideal mechanical advantage is 6. How many strands support the mass to be lifted?
ANSWER: 6

Tuesday, April 30, 2013

Of the following, the most energetic form of NON-IONIZING radiation is


Q-1: Of the following, the most energetic form of NON-IONIZING radiation is:
1) ultra-violet light
2) infra-red light
3) radar
4) microwaves
ANSWER: 1 -- ULTRA-VIOLET LIGHT
Q-2: To within one minute, what is the half-life of the neutron?
ANSWER: 11.7 MINUTES (accept: 10.7 to 12.7 minutes)
Q-3:  When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called:
1) ions
2) free radicals
3) stable molecules
4) gases
ANSWER: 2 -- FREE RADICALS
Q-4:  The ability of an atom to absorb neutrons is its neutron capture cross section. The unit of measurement for neutron capture cross section is:
1) the nucleus volume
2) capture capacity
3) resonance quotient
4) barn
ANSWER: 4 -- BARN
Q-5:  In EXTRA-TERRESTRIAL SPACE, heat is transferred by:
1) conduction
2) convection
3) conduction and convention
4) radiation
ANSWER: 4 -- RADIATION
Q-6: A 100-watt light bulb is left on for 10 hours. Electricity is 10 cents per kilowatt-hour. How much did it cost to operate the light bulb?
ANSWER: 10 CENTS
Q-7:  The position of a particle with respect to time is given by the equation: x = t3 + 2 where x is in feet and t is in seconds. What is the acceleration of the particle at a time of 2 seconds?
ANSWER: 12 FEET PER SECOND SQUARED
Q-8: he principle that energy may be converted from one form to another but it cannot be either created or destroyed is:
1) First Law of Thermodynamics.
2) Second Law of Thermodynamics.
3) Third Law of Thermodynamics.
4) Principle of photoelectricity.
ANSWER: 1 -- FIRST LAW OF THERMODYNAMICS.
Q-9: Photoelectric electricity is produced directly from solar energy when which of the following are absorbed in a semiconductor to create an electric current?
1) protons
2) electrons
3) neutrons
4) photons
ANSWER: 4 -- PHOTONS
Q-10:  A solar cell does NOT respond to red light, but DOES respond to green light. The solar cell will be able to respond to:
1) microwaves
2) infra-red light
3) ultraviolet light
4) all of the above
ANSWER: 3 -- ULTRAVIOLET LIGHT 

Of the following, which is the best fuel for a nuclear fusion reactor


Q-1: Of the following, which is the best fuel for a nuclear fusion reactor:
1) hydrogen
2) lithium
3) deuterium
4) helium
ANSWER: 3 -- DEUTERIUM
Q-2:In a spent fuel assembly, the radioactive elements having the longest half-lives are the:
1) fission products
2) actinides
3) activation products
4) radioisotopes of lead
ANSWER: 2 -- ACTINIDES
Q-3: Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses:
1) fissionable plutonium-239 as fuel.
2) a relatively low heat output.
3) neutrons moderated to relatively low energies.
4) liquid sodium as a coolant.
ANSWER: 3 -- NEUTRONS MODERATED TO RELATIVELY LOW ENERGIES.
Q-5: A fast reactor uses:
1) an extremely short time to get to the maximum operating reactivity.
2) uranium-235 as fuel.
3) heavy water as a coolant.
4) essentially unmoderated neutrons.
ANSWER: 4 -- ESSENTIALLY UNMODERATED NEUTRONS.
Q-6: Most of the new atoms formed when atoms in a nuclear reactor capture neutrons without fissioning are:
1) fission products
2) activation products
3) actinides
4) lead isotopes
ANSWER: 3 -- ACTINIDES
Q-8: Most of what we call background radiation comes from two sources. One is the naturally radioactive elements around us. What is the other source?
ANSWER: COSMIC RADIATION
Q-9:In 1932, the first ARTIFICIAL source of radiation was created in France by two famous scientists. Name the TWO scientists.
ANSWER: IRENE and FREDERIC (JOLIOT-)CURIE
Q-10: The average annual dose of NATURAL radiation by the average American is about:
1) 3 millirems
2) 30 millirems
3) 300 millirems
4) 3,000 millirems
ANSWER: 3 -- 300 MILLIREMS
Q-11: In the fission of U235, what is the average number of neutrons produced in the fission reaction?
1) 1.5
2) 2.5
3) 3.5
4) 4.5
ANSWER: 3 -- 2.5

Monday, April 29, 2013

A British Thermal Unit, or BTU, is the amount of heat required to raise one pound of what material one degree Fahrenheit?


Q-1: A British Thermal Unit, or BTU, is the amount of heat required to raise one pound of what material one degree Fahrenheit?
ANSWER: WATER
Q-2:  For which of the following reasons is plutonium-238 used for generating electricity on spacecraft?
1) It is an alpha emitter with long half-life.
2) It is a beta emitter with high specific power.
3) It occurs abundantly in nature.
4) It has low specific power.
ANSWER: 1 -- IT IS AN ALPHA EMITTER WITH LONG HALF-LIFE.
Q-3: Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is:
1) a different chemical compound.
2) a different wavelength.
3) resistant to magnetism.
4) slightly lighter than uranium-238.
ANSWER: 4 -- SLIGHTLY LIGHTER THAN URANIUM-238.
Q-4: In a light-water reactor, the coolant is ordinary water. What is the moderator?
ANSWER: WATER or THE SAME WATER
Q-5:  Of the following, which non-fissioning element is used in the cooling water of nuclear power plants to help control the rate of the fission reaction by absorbing neutrons:
1) zirconium
2) boron
3) krypton
4) cesium
ANSWER: 2 -- BORON
Q-6:  The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the:
1) reactor
2) coolant/moderator
3) cooling tower
4) control rod
ANSWER: 2 -- COOLING TOWER
Q-7:  The form of the fuel in U.S. commercial nuclear power plants is which of the following:
1) uranium oxide ceramic pellets
2) atomic vapor
3) uranium metal tubes
4) uranium solution in water
ANSWER: 1 -- URANIUM OXIDE CERAMIC PELLETS
Q-8: Which of the following is NEVER used as a coolant in nuclear reactors:
1) liquid nitrogen
2) liquid sodium
3) water
4) helium gas
ANSWER: 1 -- LIQUID NITROGEN
Q-9:  In a breeder reactor, new fuel is formed as non-fuel uranium-238 absorbs a neutron and ultimately becomes which of the following fissionable atoms:
1) uranium-235
2) plutonium-239
3) uranium-239
4) neptunium-239
ANSWER: 2 -- PLUTONIUM-239

It has been said that the universe will die an "entropy death". This means that


Q-1: It has been said that the universe will die an "entropy death". This means that:
1) the universe will eventually explode.
2) the universe will be at the same temperature everywhere.
3) the universe will collapse into a black hole.
4) matter and antimatter will never combine.
ANSWER: 2 -- THE UNIVERSE WILL BE AT THE SAME TEMPERATURE
EVERYWHERE.
Q-2: What is the color of light emitted from an Argon-Ion laser?
ANSWER: GREEN or BLUE-GREEN
Q-3:The type of radiative scattering commonly associated with the atmosphere and the reason the sky is blue is called what?
ANSWER: RAYLEIGH SCATTERING
Q-4:Radiant energy emitted from a blackbody is only a function of what?
ANSWER: TEMPERATURE
Q-5: Two coal trains, one southbound, the other westbound, reach an over and under crossing at the same instant and each proceed at 40 kilometers per hour on their respective courses. Approximately how far apart are the lead cars two hours later, to the nearest kilometer?
1) 80
2) 113
3) 136
4) 160
ANSWER:2 -- 113
Q-6:State the unit of electromagnetic induction.
ANSWER: GAUSS OR TESLA
Q-7:Which of the laws of Thermodynamics is often invoked to discredit attempts at perpetual motion?
ANSWER: SECOND LAW OF THERMODYNAMICS
Q-8: A ball is dropped from a height of 256 feet. The acceleration due to gravity is 32 feet per second squared. How many seconds will it take for the ball to reach the ground?
ANSWER: 4
Q-9: A resistor of value R/2 is connected in parallel with a resistor of value R/3. The voltage drop across the parallel combination is V. The total current supplied by the voltage source is:
1) 2 V/R (read: 2 V over R)
2) 3 V/R (read: 3 V over R)
3) 4 V/R (read: 4 V over R)
4) 5 V/R (read: 5 V over R)
ANSWER:4 -- 5 V/R
Q-10: The idea that we CANNOT know both the position and velocity of a subatomic particle at the same time was formulated by:
1) Einstein
2) Heisenberg
3) Fermi
4) Schroedinger
ANSWER: 2 -- HEISENBERG
Q-11: Suppose a crane lifts a 900 kilogram wrecking ball 12 meters above a concrete slab. 105,840 Joules of potential energy are stored in the wrecking ball. Now the ball is dropped. When the ball is 6 meters above the concrete slab, what is it's potential energy in Joules?
ANSWER: 52,920 JOULES

Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is


Q-1: Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is:
1) blue-white
2) bright red
3) yellow
4) orange
ANSWER: 1 -- BLUE-WHITE
Q-2: A 5 kilogram mass is lifted at constant velocity from a shop floor by a rope that passes through a pulley attached to the shop's ceiling. Neglecting the mass of the rope and friction in the pulley, what is the approximate tension in the rope?
1) 100 newtons
2) 50 newtons
3) 25 newtons
4) 5 newtons
ANSWER: 2 -- 50 NEWTONS
Q-3: Ball "A" ROLLS down an inclined plane without slipping. An identical ball, Ball "B", SLIDES down the same inclined plane without rolling. Which of the following statements is true?
1) Ball "A" has more kinetic energy
2) Ball "B" has more kinetic energy
3) their kinetic energies are the same
4) their rotational kinetic energies are equal just after release
ANSWER: 3 -- THEIR KINETIC ENERGIES ARE THE SAME
Q-4: An object located four focal lengths in front of a thin, converging lens is moved to within two focal lengths of the lens. As a result, does the size of the image produced by the lens increase, decrease or remain the same?
ANSWER: INCREASE
Q-5:  What is the wavelength in millimeters of a sound wave whose frequency is 35 KILOHERTZ. Assume the speed of sound is 350 METERS PER SECOND?
1) 100 millimeters
2) 1,000 millimeters
3) 10 millimeters
4) 1/10 millimeters
ANSWER: 3 -- 10 MILLIMETERS
Q-6: Heat from the sun reaches the Earth by:
1) conduction
2) convection
3) radiation
4) none of the above
ANSWER: 3 -- RADIATION
Q-7:  What is a calorie?
1) amount of heat required to raise one gram of water one degree Celsius.
2) amount of work required to move one gram of water by one centimeter.
3) amount of heat required to melt ice.
4) amount of heat required to raise one gram of water one degree Fahrenheit
ANSWER: 1 -- AMOUNT OF HEAT REQUIRED TO RAISE ONE GRAM OF
WATER ONE DEGREE CELSIUS
Q-8:  To within 1 pound per square inch, what is the nominal pressure due to water at a depth of 100 feet below the surface of a body of water?
ANSWER: 43.3 POUNDS PER SQUARE INCH (accept 42.3 to 44.3)
Q-9: The energy of molecular motion in a gas appears in the form of:
1) friction
2) internal energy
3) temperature
4) potential energy
ANSWER:3 -- TEMPERATURE

An object dropped from rest near the Earth's surface will fall how far in the first second


Q-1: An object dropped from rest near the Earth's surface will fall how far in the first second:
1) 4.9 meters
2) 9.8 meters
3) 16.0 meters
4) 32 meters
ANSWER: 1 -- 4.9 METERS
Q-2: To a person standing on shore, an object dropped from the mast of a passing sailboat will trace what path, assuming negligible air resistance. Is it:
1) vertical straight line
2) slanted straight line
3) parabola
4) hyperbola
ANSWER: 3 -- PARABOLA
Q-3:  The energy dissipated when a car hits a tree at 70 miles per hour is ABOUT how much greater than that dissipated at 50 miles per hour?
1) 20 percent
2) 40 percent
3) 70 percent
4) 100 percent
ANSWER: 4 -- 100 PERCENT
Q-4:  What happens to the period of a pendulum if the mass of the bob is quadrupled?
1) it is cut in half
2) it stays the same
3) it is doubled
4) it is quadrupled
ANSWER: 2 -- IT STAYS THE SAME
Q-5:  According to the theory of relativity, people who travel at relativistic velocities and then return home will be:
1) shorter than if they had not made the trip.
2) taller than if they had not made the trip.
3) younger than if they had not made the trip.
4) older than if they had not made the trip.
ANSWER: 3 -- YOUNGER THAN IF THEY HAD NOT MADE THE TRIP.
Q-6: Which of the following units of energy is the smallest:
1) calorie
2) Joule
3) erg
4) electron-volt
ANSWER: 4 -- ELECTRON-VOLT
Q-7: Which of the following quantities has the GREATEST influence on the overall efficiency of a conventional (Rankine cycle) electric generating station burning fossil fuels?
1) steam temperature at the steam turbine inlet
2) net heating value of the fuel
3) steam pressure at the steam turbine inlet
4) pounds of ash and sulfur per pound of fuel
ANSWER: 1 -- STEAM TEMPERATURE AT THE STEAM TURBINE INLET
Q-8:  The index of refraction of a plastic material is 1.5. The speed of light in this material relative to that in a vacuum is:
1) 2
2) 1.5
3) 2/3
4) 1/2
ANSWER: 3 -- 2/3

The father of the atomic bomb is OPPENHEIMER


Q-1: The father of the atomic bomb is:
1) Einstein
2) Oppenheimer
3) Faraday
4) Strangelove
ANSWER: 2-- OPPENHEIMER
Q-2: At what point is the temperature the same on the Celsius and Fahrenheit scales?
1) Absolute zero
2) Zero
3) Negative 40 degrees
4) Never
ANSWER: 3 -- NEGATIVE 40 DEGREES
Q-3:What does the letter "s" stand for in the acronym laser?
1) scientific
2) simulated
3) stimulated
4) solar
ANSWER: 3 -- STIMULATED (LIGHT AMPLIFICATION BY STIMULATED
MISSI)
Q-4: What is the DeBroglie wavelength of a 1,200 kilogram corvette traveling at a rate of 25 meters per second? Planck's constant is equal to 6.62 x 10-34 Joule-seconds.
1) 5.3 x 10-32 meters
2) 5.9 x 10-34 meters
3) 2.1 x 10-38 meters
4) 1.6 x 10-40 meters
ANSWER: 3-- 2.1 x 10-38 METERS
Q-5:What property of a metal describes the onset of plastic deformation in a tensile test?
1) tensile strength
2) elongation
3) yield strength
4) reduction in area
ANSWER: 3 -- YIELD STRENGTH
Q-6: It is a very hot day. You are in a special kitchen, in that there are no exits and the walls of this kitchen are thermally very well insulated. If you open the refrigerator door, the room will eventually:
1) cool off.
2) remain the same.
3) heat up.
ANSWER: 3 -- HEAT UP.
Q-7: Consider two water drops at a temperature T. These drops are NOT allowed to exchange energy with their environment. These two drops collide and combine. How does the temperature of these drops change when they combine? Does it:
1) decrease
2) remain the same
3) increase
ANSWER: 3 -- INCREASE
Q-8:A model airplane flies over the ocean in level flight at an altitude of 19.6 meters. How long does it take a bomb, dropped from under the wing, to impact the water?
ANSWER: 2 SECONDS
Q-9:A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 c RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars?
1) 0.6 c
2) 0.88 c
3) 1.2 c
4) 1.34 c
ANSWER: 2 -- 0.88 c

One barrel of oil has about the same heat content as how much coal


Q-1: One barrel of oil has about the same heat content as how much coal:
1) 70 pounds
2) 700 pounds
3) 1,400 pounds
4) 2,800 pounds
ANSWER: 2 -- 700 POUNDS
Q-2: Two identical resistors are connected in parallel and consume 200 watts together. A third identical resistor is added in parallel. The total power consumed is:
1) 100 watts
2) 200 watts
3) 300 watts
4) 400 watts
ANSWER: 3 -- 300 WATTS
Q-3:The length of both sides of a square parallel plate capacitor are doubled. The capacitance is:
1) halved
2) the same
3) doubled
4) quadrupled
ANSWER: 4 -- QUADRUPLED
Q-4:A series circuit consists of a two ohm RESISTOR and a one ohm INDUCTOR. The relationship between current and voltage is:
1) current will lag by 30 degrees.
2) current will lag by 26 degrees.
3) current will lead by 26 degrees.
4) current will lead by 30 degrees.
ANSWER: 2 -- CURRENT WILL LAG BY 26 DEGREES.
Q-5: A transformer has a turns ratio of two to one. If a 100 ohm resistor is connected on the high side, its resistance as measured on the low side would be:
1) 25 ohms
2) 50 ohms
3) 100 ohms
4) 400 ohms
ANSWER: 1 -- 25 OHMS
Q-6: The doorbell on your house requires a 12 volt alternating current. A transformer having a primary winding of 1,600 turns is to be used to step down your house's 110-volt alternating current. How many turns are there on the secondary winding?
ANSWER: 175 TURNS
Q-7: What is the impedance of a one microfarad capacitor at 60 Hertz:
1) 16,700 ohms
2) 2,650 ohms
3) 3.8x10-4 ohms
4) 6x10-5 ohms
ANSWER: 2 -- 2,650 OHMS
Q-8:Which of the following instruments should never have their test leads connected directly to a wall outlet:
1) ammeter
2) voltmeter
3) oscilloscope
4) frequency counter
ANSWER: 1 -- AMMETER
Q-9: The speed of light through a single-mode optical fiber is approximately:
1) c (equal to 3 x 108 m/s)
2) 70 percent of c
3) 80 percent of c
4) 90 percent of c
ANSWER: 2 -- 70 PERCENT OF c

If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force


Q-1: If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force:
1) double
2) one half
3) remain the same
4) one quarter
ANSWER: 4 -- ONE QUARTER
Q-2:  The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the:
1) Blue shift
2) Neutral shift
3) Red shift
4) Dirac shift
ANSWER: 3 -- RED SHIFT
Q-3:  On a weather map, the lines that depict equal pressure are called what?
ANSWER: ISOBARS
Q-4:  A far-sighted person, without optical correction, is typically able to see nearby objects more clearly in bright light. The reason for this phenomena is:
1) bright light provides better illumination.
2) the pupil of the eye narrows which increases the depth of focus.
3) the pupil of the eye widens which increases the depth of focus.
4z) the bright light causes squinting which flattens the eyeball which tends to correct the far-sighted condition.
ANSWER: 2 -- THE PUPIL OF THE EYE NARROWS WHICH INCREASES THE DEPTH OF FOCUS
Q-5: The first reflecting telescope was built by:
1) Galileo
2 Copernicus
3) Tycho Brahe
4) Isaac Newton
ANSWER: 4 -- ISAAC NEWTON
Q-7:  Ten Coulombs of charge flowing through a wire per second is equal to:
1) 100 Amperes
2) 10 Ampere
3) 1 Amperes
4) 0.1 Amperes
ANSWER: 2 -- 10 AMPERES
Q-8:  Magnetic fields are produced by:
1) resistance
2) an electric potential difference
3) electric current
4) stationary charge
ANSWER: 3 -- CURRENT
Q-9: A 10 ohm and a 20 ohm resistor are connected in parallel to a current source. What fraction of the current flows through the 20 ohm resistor?
1) 1/2
2) 1/3
3) 2/3
4) 3/4
ANSWER: 2 -- 1/3

Magnifying glasses are useful, because they create an enlarged


Q-1: Magnifying glasses are useful, because they create an enlarged:
1) virtual image behind the actual object.
2) real image behind the actual object.
3) virtual image in front of the actual object.
4) real image in front of the actual object.
ANSWER: 1 -- VIRTUAL IMAGE BEHIND THE ACTUAL OBJECT.
Q-2:  Which pot of water will boil LAST when all are heated by the same source?
1) aluminum pot
2) iron pot
3) brass pot
4) titanium pot
ANSWER: 4 -- TITANIUM POT
Q-3: How many atoms per unit cell are in a face-centered-cubic crystal?
1) two
2) four
3) six
4) eight
ANSWER: 2 -- FOUR
Q-4: Refractory metals are known for which of the following properties:
1) lack of chemical reactivity
2) low density
3) high melting point
4) high thermal conductivity
ANSWER: 3 -- HIGH MELTING POINT
Q-5: A small hole in a sheet of aluminum foil is used to diffract yellow light both under water and in a vacuum. Which is true?
1) light diffracts less in the water because its wavelength is larger.
2) light diffracts less in the water because its wavelength is smaller.
3) light diffracts more in the water because its wavelength is larger.
4) light diffracts more in the water because its wavelength is smaller.
ANSWER: 2 -- LIGHT DIFFRACTS LESS IN THE WATER BECAUSE ITS WAVELENGTH IS SMALLER
Q-6:  A 20 ohm resistor and a 60 ohm resistor are connected in parallel to a voltage source. If the current in the 60 ohm resistor is one ampere, the current in the 20 ohm resistor will be:
1) 1/3 ampere
2) 2/3 ampere
3) 1 ampere
4) 3 amperes
ANSWER: 4 -- 3 AMPERES
Q-7:  An LED is operated on a 12 volt automobile circuit. The voltage drop across the LED is 2 volts and the current must be limited to 50 milliamps to prevent its overheating and destruction. What size resistor must be used?
1) 60 ohms
2) 100 ohms
3) 120 ohms
4) 200 ohms
ANSWER: 4 -- 200 OHMS
Q-8:  Which is NOT a characteristic of a series circuit?
1) The current is the same throughout.
2) The total resistance is the sum of the individual resistance.
3) The voltage of the source equals the sum of the circuit's individual voltage drops.
4) The total resistance is the sum of the reciprocals of the individual resistances.
ANSWER: 4 -- THE TOTAL RESISTANCE IS THE SUM OF THE RECIPROCALS
OF THE RECIPROCAL OF THE INDIVIDUAL RESISTANCES.

The magnetic field produced by a long straight wire carrying a current points:


Q-1: The magnetic field produced by a long straight wire carrying a current points:
1) in the direction of the current
2) toward the wire
3) away from the wire
4) circles around the wire
ANSWER: 4 -- CIRCLES AROUND THE WIRE
Q-2:What is the molecular mass of a gas that effuses through a small hole at twice the rate as oxygen gas at the same temperature. (The molecular mass of O2 is 32.)
1) 8.0 atomic mass units
2) 16 atomic mass units
3) 48 atomic mass units
4) 64 atomic mass units
ANSWER: 1 -- 8.0 ATOMIC MASS UNITS
Q-3:Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the vapor pressure of "X" be when the volume above the liquid is 100 ml and the temperature 25!C? Some liquid is always present.
1) 30 torr
2) 60 torr
3) 120 torr
4) 240 torr
ANSWER: 3 -- 120 TORR
Q-4: bird weighing 2 pounds is inside a completely enclosed box weighing 3 pounds. There is no air exchange between the inside and outside of the box. If the box is placed on a scale, and the bird is flying inside the box, what weight does the scale read?
ANSWER: 5 POUNDS
Q-5:Mickey is fishing from his row boat at his favorite spot in the lake. He has a large rock in the bottom of the boat for stability and ballast. Mickey decides to call it quits. To lighten his load, he tosses the rock overboard before rowing to shore. Does the water level of the lake:
1) go up
2) go down
3) remain the same
ANSWER: 2 -- GO DOWN
Q-6: An electrical discharge ionizing the air around a conductor is called:
1) Flux
2) Corona
3) Ozone
4) Field
ANSWER: 2 -- CORONA
Q-7: The speed of sound (at sea level) in air is:
1) 340 meters per second
2) 400 meters per second
3) 500 meters per second
4) 760 kilometers per second
ANSWER: 1 -- 340 METERS PER SECOND
Q-8: How many molecules are present in 2.5 liters of gas at STP?
1) 5.6 x 1024 molecules
2) 1.5 x 1024 molecules
3) 6.0 x 1023 molecules
4) 6.7 x 1022 molecules
ANSWER: 4 -- 6.7 X 1022 MOLECULES
Q-9:If 64Cu emits a beta particle, what would the product be?
1) 63Cu
2) 64Cu+1
3) 64Cu-1
4) 64Zn
ANSWER: 4 -- 64Zn

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