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