What is the maximum possible arc that can be subtended by a rainbow? (Consider all possible viewing geometries)
a. 90°
b. 180°
c. 270°
d. 360°
d
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Event A occurs before event B in a certain frame of reference. In another frame of reference, event A could occur
A) after event B. B) simultaneous with event B. C) either of these D) neither of these
Wave Characteristics: Which one of the following lists gives the correct order of the electromagnetic spectrum from low to high frequencies?
A. radio waves, infrared, microwaves, ultraviolet, visible, x-rays, gamma rays B. radio waves, ultraviolet, x-rays, microwaves, infrared, visible, gamma rays C. radio waves, microwaves, infrared, visible, ultraviolet, x-rays, gamma rays D. radio waves, microwaves, visible, x-rays, infrared, ultraviolet, gamma rays E. radio waves, infrared, x-rays, microwaves, ultraviolet, visible, gamma rays
Assume that 10 J of work pushes a charge initially at rest into an electric field. If the charge is then released, it flies back to its starting position with a kinetic energy of
A) zero. B) 5 J. C) 10 J. D) more than 10 J. E) need more information.
Einstein's famous equation E = mc2 is a statement of
a. time dilation. b. length contraction. c. the equivalence of mass and energy. d. the principle of relativity. e. none of the above.