A ball falls to the ground from height h and bounces to height h'. Momentum is conserved in the ball-earth system
a. no matter what height h' it reaches.
b. only if h' < h.
c. only if h' = h.
d. only if h' > h.
e. only if h' ? h.
a
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An empty floating boat interacts gravitationally with the earth. A different interaction with something else keeps the boat from responding to the gravitational interaction by sinking. What is the other object that interacts with the boat?
A. The water B. The atmosphere C. The earth D. The lake floor E. Other (specify)
A transformer is based on a principle of
A) self inductance. B) direct current. C) alternating current. D) mutual inductance. E) energy conservation.
The figure represents the position of a particle as it travels along the x-axis. Between t = 2 s and t = 4 s, what is (a) the average speed of the particle and (b) the average velocity of the particle?
What will be an ideal response?
A long nonconducting cylinder (radius = 12 cm) has a charge of uniform density (5.0 nC/m3) distributed throughout its column. Determine the magnitude of the electric field 5.0 cm from the axis of the cylinder.
A. 25 N/C B. 20 N/C C. 14 N/C D. 31 N/C E. 34 N/C