If the potential difference across the plates of a capacitor is doubled, what happens to the energy stored?
A. it stays the same
B. it doubles
C. it quadruples
D. it halves
E. it increases by a factor of 1.414
C. it quadruples
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A. hamburger B. sandwich C. pizza D. sushi
Neglecting air resistance, once a tossed ball leaves your hand
A) no further forces act on it. B) only the force due to gravity acts on it. C) inertia becomes the force acting on it. D) your tossing force remains while the ball goes upward. E) your tossing force remains until it comes to a stop.
What can be said about the presence of order in living organisms?
A) it is a necessary condition, but not a sufficient condition for life B) it is a sufficient condition, but not a necessary condition for life C) it is both a necessary condition and a sufficient condition for life D) it is neither a necessary condition nor a sufficient condition for life
A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A and it leads the voltage by 60°. What is the value of the capacitance in this circuit?
A) 13 ?F B) 14 ?F C) 15 ?F D) 16 ?F E) 17 ?F