If VA?VB = 50 V, how much energy is stored in the 54-?F capacitor?
A. 50 mJ
B. 13 mJ
C. 28 mJ
D. 8.9 mJ
E. 17 mJ
Answer: B
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The nucleus is made of ____
a. electrons only. b. protons only. c. neutrons only. d. electrons and protons, usually. e. protons and neutrons, usually.
How long a star can remain on the main sequence depends upon its __________
Fill in the blank(s) with correct word
A student kicks a soccer ball in a high arc toward the opponent's goal. At the highest point in its trajectory:
A) both velocity and acceleration of the soccer ball are zero. B) neither the ball's velocity nor its acceleration is zero. C) the ball's acceleration is zero but not its velocity. D) the ball's acceleration points upwards. E) the ball's velocity points downwards.
An electron gun sends electrons through a region with an electric field of 
for a distance of 2.5 cm. If the electrons start from rest, how long does it take for the electrons to traverse the gun?
A. 1.1 ns B. 1.1 ?s C. 2.2 ns D. 2.2 ?s E. 4.4 ns