A generator has 200 turns of wire on a coil of radius 2.00 cm. What rotational speed is necessary to produce an emf of amplitude 4.50 V if the magnetic field in the region of the coil is 0.180 T?
A. 60.0 rad/s
B. 16.0 rpm
C. 100 rpm
D. 500 rpm
E. 950 rpm
E. 950 rpm
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Which scenario is portrayed by the graph?
A. A car starts from rest and accelerates. It then travels at a constant velocity before slowing to a stop.
B. A car starts from rest and moves forward. It stops for a while before returning to its starting position.
C. A car travels at a constant velocity, then accelerates for a while, then returns to its initial constant velocity.
What are redshift surveys designed to show?
What will be an ideal response?
A simple pendulum of length 2.00 m is used to measure the acceleration of gravity at the surface of a distant planet. If the period of such a pendulum is 7.00 s, what is the acceleration of gravity?
A) 7.89 m/s2 B) 6.78 m/s2 C) 1.61 m/s2 D) 0.513 m/s2 E) 17.8 m/s2
Air moves away from a high-pressure region where it
A) sinks. B) rises. C) cools. D) stops.