The Modulus of Elasticity for a material refers to THE RATIO OF STRESS OVER STRAIN

Q-1: The Modulus of Elasticity for a material refers to:

1) the ability of a material to resist corrosion
2) the ratio of stress over strain
3) the maximum load over the cross sectional area
4) none of the above
ANSWER: 2 -- THE RATIO OF STRESS OVER STRAIN

Q-2:  The rest mass of an electron is closest to:

1) 10-15 kilograms
2) 10-17 kilograms
3) 10-30 kilograms
4) 10-50 kilograms
ANSWER: 3 -- 10-30 KILOGRAMS (accept 9.11 x 10-31kg)

Q-3: Carbon-14 dating is based on the decay of 14C to 14N. What type of radioactive decay is associated with this nuclear reaction?

ANSWER: b-RAY or b DECAY or ELECTRON EMISSION

Q-4:  Normal sunlight is non-polarized. Why are polarized sunglasses worn?

ANSWER: REFLECTED LIGHT FROM SMOOTH SURFACES IS POLARIZED

Q-5:  Many common household fluids, such as margarine, undergo a decrease in viscosity when subjected to a shearing force. What is this property called?

ANSWER: THIXOTROPIC (pron: thik-sa-trop-ick)

Q-6:  How much energy in consumed if a 100 watt light bulb is operated for 10 MINUTES?

ANSWER: 60,000 JOULES or 60kJ or 6X104J

Q-7:  If the energy reaching your eyeball at 10 meters from a small light bulb is expressed as x, express the energy which would reach your eyeball at 20 meters?

ANSWER: (1/4)x

Q-8:  How much current does a 1500 Watt heater draw if supplied with a 120 Volt source?

ANSWER: 12.5 AMPS

Q-9: The area of thermodynamics concerned with the measuring of thermal properties is called what?

ANSWER: CALORIMETRY

Q-10: The temperature and pressure at which a substance can exist in all three phases of matter simultaneously is called what?

ANSWER: TRIPLE POINT

Q-11:  Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because:

1) red light is focused more strongly than blue light
2) blue light is focused more strongly than red light
3) the outer light rays are focused more strongly than the central rays,
4) the central light rays are focused more strongly than the outer rays.
ANSWER: 2 -- BLUE LIGHT IS FOCUSED MORE STRONGLY THAN RED LIGHT

Q-12:  Which of the following scientific instruments has the greatest resolving power?

1) electron microscope
2) light microscope
3) phase-contrast microscope
4) centrifuge
ANSWER: 1 -- ELECTRON MICROSCOPE

Q-13:  One curie is equal to:

1) the square root of the binding energy
2) the energy of an alpha-particle
3) 3.7 x 1010 disintegrations per second
4) mc2
ANSWER: 3 -- 3.7 x 1010 DISINTEGRATIONS PER SECOND