When a rocket ship gaining speed in outer space runs out of fuel, it
A) gains speed for a short time, then slows down to a constant velocity.
B) gains speed for a short time, slows down, and eventually stops.
C) no longer gains speed.
Answer: C
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What causes Mercury's 3:2 spin-orbit resonance?
A) the planet's closeness to the Sun B) the planet's very eccentric orbit C) the planet's high density D) tidal torques operating on the planet E) All of the above are factors.
Light having a wavelength in vacuum of 600 nm enters a liquid of refractive index 2.0. In this liquid, its wavelength will be
A) 1200 nm B) 600 nm C) 300 nm D) 150 nm E) None of the above choices are correct.
A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity increases to 40 rad/s. Assume that the angular acceleration was constant during the 5.0-s interval. How many revolutions does the wheel turn through during the 5.0-s interval?
a. 20 rev b. 24 rev c. 32 rev d. 28 rev e. 39 rev
The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
a. True b. False Indicate whether the statement is true or false