The medium in which a wave travels
A) moves along with the wave.
B) transmits the wave.
C) inhibits the wave.
D) reflects the wave.
Answer: B
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According to Einstein, gravity is
A) the bending of space that is caused by masses. B) the force that masses exert on each other. C) caused by the electromagnetic force. D) due only to velocity. E) due only to acceleration.
Arrange the following distances in order from smallest to largest. I. kilometer II. light-year III. yard IV. Astronomical unit
a. I, II, III, IV b. IV, III, II, I c. III, I, IV, II d. II, I, IV, III e. III, I, II, IV
An airplane is flying horizontally in a region where the earth's magnetic field is 5.2 × 10-5 T downward. If the speed of the plane is 200 m/s and the wing tips are 65 m apart, what is the potential difference between the wing tips?
A) 1.0 × 10-5 V B) 0.34 V C) 0.68 V D) 0 E) 1.0 × 10-2 V
What are the "rungs" of a DNA spiral made up of?
a. RNA b. four chemical bases arranged in pairs c. enzymes d. ribosomes e. proteins