A satellite in an elliptical orbit about a planet travels much faster when it is directly over a
A) large ocean.
B) large island.
C) high mountain range.
D) great plain or plateau.
E) none of the above
Answer: E
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The wavelength of a periodic wave is 0.800 m. If the frequency is 400 Hz, then what is the magnitude of the k vector of the wave?
A. 8.56 
B. 7.85
C. 7.02
D. 6.35
E. 5.98
The magnetic field of a long, straight wire has a value B0 at a distance of r0 when the current is I0. At a distance of 3.00 r0. what current is necessary to produce a field having the same strength B0 at this position?
1. 1.73 I0 2. 3.00 I0 3. 9.00 I0 4. More information is needed.
What centripetal force does an 80.0-kg passenger experience when seated 10.0 m from the center of a Ferris wheel whose angular speed is 0.500 rad/s?
a. 2.00 N b. 24.5 N c. 400 N d. 200 N
A certain automobile engine takes in 4.00 kJ of heat and performs 1.10 kJ of mechanical work in each cycle
(a) Calculate the engine's efficiency. (b) How much heat is "wasted" in each cycle?