A ball of mass mB is released from rest and acquires velocity of magnitude vB before hitting the ground. The ratio of the impulse delivered to the Earth to the impulse delivered to the ball is
A.
B.
.C.
.D.
E.
.Answer: D
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The equivalent capacitance of the circuit shown below is
a.
0.2 C.
b.
0.4 C.
c.
1 C.
d.
4 C.
e.
5 C.
What is the effect of resonance on Mercury's rotation?
A. Mercury's spin has slowed down. B. Mercury spins three times on its axis for every two orbits. C. Mercury shows the same face to the Sun when Mercury is closest to it. D. All of these choices are correct.
If no molecular collisions occurred in a sample of gas, temperature of the gas would
A) increase. B) decrease. C) be unaffected.
A solid steel column is 4.0 m long and 0.20 m in diameter. Young's modulus for this steel is 2.0 × 1011 N/m2. By what distance does the column shrink when a 5000-kg truck is supported by it?
A) 3.2 × 10-6 m B) 8.0 × 10-7 m C) 3.1 × 10-5 m D) 7.8 × 10-6 m