All places on Earth would have high tides at the same instant if the
A) Moon did not revolve.
B) Moon did not rotate.
C) Sun did not revolve.
D) Sun did not rotate.
E) none of the above
Answer: E
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What part of the electromagnetic spectrum has the longest wavelength?
A. Radio waves B. X-rays C. Visible light D. Gamma rays
A quantum of electromagnetic radiation is a
a. wave function. b. photon. c. de Broglie wave. d. laser. e. hologram.
An unpolarized beam of light of a single pure color can be split apart into two separate beams by using
A. a birefringent material like calcite. B. the human retina. C. a thin layer of oil. D. metal-ceramic inversion.
When you throw a ball, the work you do to accelerate it equals the kinetic energy the ball gains. If you do twice as much work when throwing the ball, does it go twice as fast?
a) Yes. Twice as much work will give the ball twice as much kinetic energy. Since KE is proportional to the speed, the speed will double as well. b) Yes. Twice as much work will give the ball four times as much kinetic energy. Since KE is proportional to the speed squared, the speed will be the square root of 4, or twice as fast. c) No. Twice as much work will give the ball twice as much kinetic energy. But since KE is proportional to the speed squared, the speed will be ?2 times larger. d) No. Twice as much work will give the ball four times as much kinetic energy. Since KE is proportional to the speed, the speed will be four times larger.