The loop is entirely inside the field.
A. forward (in the +x direction).
B. backward (in the -x direction).
C. zero.
D. some other direction (specify).
C. zero.
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At the top of a cliff 100 m high, Raoul throws a rock upward with velocity 15.0 m/s. How much later should he drop a second rock from rest so both rocks arrive simultaneously at the bottom of the cliff?
a. 8.08 s b. 3.31 s c. 5.02 s d. 1.78 s e. 0.89 s
At the lowest point in a vertical dive (radius = 0.58 km), an airplane has a speed of 300 km/h which is not changing. Determine the magnitude of the acceleration of the pilot at this lowest point.
A. 26 m/s2 B. 21 m/s2 C. 16 m/s2 D. 12 m/s2 E. 8.8 m/s2
A chamber that can be filled with different gases has placed in it a source of sound that in air produces a frequency of 200 Hz and a microphone to pick up the sound for frequency analysis. First the chamber is filled with helium (speed of sound 1 000 m/s at room conditions), then the helium is replaced with oxygen (speed of sound 330 m/s at room conditions), and then finally the helium is
replaced with carbon dioxide (speed of sound 269 m/s at room conditions). In which gas is the highest frequency of sound found by the microphone during this experiment? a. helium b. oxygen c. carbon dioxide d. They all have the same frequency of sound.
The redshifts of Galaxy A and Galaxy B have been measured. The redshift of Galaxy B is twice that of Galaxy A. Which is moving away faster?
A. Galaxy A B. The two galaxies may be moving away at the same speed since their recessional velocity depends upon their distance. C. Galaxy B