All nuclei of a given element have the same number of
A) neutrons.
B) protons.
C) nucleons.
D) protons + neutrons.
B
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At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 ?F, ? = 30 V, and R = 5.0 k?, at what rate is energy being stored in the capacitor when I = 2.0 mA?
A. 32 mW B. 40 mW C. 44 mW D. 36 mW E. 80 mW
A 120-? laboratory resistor is rated at 0.25 W. How much current can safely flow through the resistor?
A) 30 A B) 2.1 mA C) 22 mA D) 46 mA
An archer pulls her bow string back 0.40 m by exerting a force that increases uniformly from zero to 240 N. What is the equivalent spring constant of the bow, and how much work is done in pulling the bow?
A tennis player wants to slam a serve at O so that the ball lands just inside the opposite corner of the court. What should the ratio 
be for the initial velocity 
? The time t = 0 is the time when the ball is hit by the racket.
?
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A.
B.
C.
D.
E.
