Phil leans over the edge of a cliff and throws a rock upward at 5 m/s. How far below the level from which it was thrown is the rock 2 seconds later?
A) 5 m
B) 10 m
C) 15 m
D) 20 m
Answer: B
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Someone on the far side of the Moon would observe Earth rise once every
a. 24 hours. b. 24 hours and 50 minutes. c. 29.5 Earth days. d. None of these, the observer would never see Earth rise.
All real engines are less efficient than the Carnot engine because
a. they do not operate through the Otto cycle. b. they do not operate through a reversible cycle. c. the working substance does not maintain a constant volume through the cycle. d. the working substance does not maintain a constant pressure through the cycle. e. the working substance does not maintain a constant temperature through the cycle.
What is a magnetosphere?
A) the uppermost layer of any planetary atmosphere B) the layer of a planet in which its magnetic field is generated C) the region in a planet's atmosphere in which auroras occur D) a region of space around a planet in which the planet's magnetic field can trap charged particles
An object is thrown upward at 5.0 m/s, and experiences only the force of gravity once thrown. One second later the object is
A. rising at 5 m/s. B. neither rising nor falling. C. falling at 4.8 m/s. D. rising at 4.8 m/s.