The Michelson-Morley experiment
A. proved that there is no luminiferous ether
B. proved that there is a luminiferous ether
C. showed that a medium is necessary for the transmission of light
A. proved that there is no luminiferous ether
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A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
A. y = ?0.10 sin 9.9t. B. y = 0.10 cos 9.9t. C. y = ?0.10 cos (9.9t + 0.1). D. y = 0.10 sin (9.9t + 5). E. y = ?0.05 cos 9.9t.
A quantity that is a measure of how the distance traveled changes with time is
A. acceleration. B. velocity. C. force. D. speed. E. momentum.
In order to remain stable, a star must have an internal balance between
A) gravity and pressure. B) gravity and temperature. C) temperature and pressure. D) pressure and nuclear fusion. E) nuclear fusion and chemical reactions.
Which of the following types of stars are suitable for advanced life?
A) A-type B) F-type C) O-type D) K-type