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201: In an electromagnetic wave, the ratio of the magnitudes of the electric field to the magnet field is equal to what?
ANSWER: THE SPEED OF LIGHT or C
202: Suppose the power of a prescription lens is 4 diopters. What is the focal length of the lens?
ANSWER: = 25 CENTIMETERS
203: Assuming all other parameters remain constant, what happens to the pressure of a gas when the volume of the gas is increased?
w) Increases
x) Decreases
y) Fluctuates sinusoid ally
z) Remains the same
ANSWER: X -- DECREASES
204: If a metallic object is heated, its density generally:
w) Increases
x) Decreases
y) Fluctuates randomly
z) Remains the same
ANSWER: X -- DECREASES
205: Which wave has the highest frequency?
w) Microwaves
x) Infrared waves
y) Ultraviolet waves
z) Radio waves
ANSWER: Y -- ULTRAVIOLET WAVES
206: The characteristic that distinguishes a laser beam from an ordinary light beam is:
w) The greater frequency of the laser beam
x) The coherence of the laser beam
y) The color of the laser beam
z) The greater polarization of the laser beam
ANSWER: X -- THE COHERENCE OF THE LASER BEAM
207: The mass spectrograph directly yields a value for which one of the following?
w) Mass of a photon
x) Mass of a neutron
y) Masses of isotopes of elements
z) Mass to charge ratio of ions
ANSWER: Z -- MASS TO CHARGE RATIO OF IONS
208: An alpha particle colliding with an electron loses:
w) None of its energy
x) Little of its energy
y) Half of its energy
z) All of its energy
ANSWER: X -- LITTLE OF ITS ENERGY
209: The term "laminar flow" is most often associated with the description of:
w) Conduction of sound by waves
x) Current flow in transistors
y) Effects of viscosity of liquids
z) Passage of light rays through a liquid
ANSWER: Y -- EFFECTS OF VISCOSITY OF LIQUIDS
210: Two point masses, M1 and M2, are 14 centimeters apart. M1 has a mass of 2 grams. M2 has a mass of 5 grams. Locate the center-of-mass of this system.
w) 4 cm from M1
x) 4 cm from M2
y) 5 cm from M2
z) 7 cm from M1
ANSWER: X -- 4 CM FROM M2
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