An air-filled 20-?F capacitor has a charge of 60 ?C on its plates. How much energy is stored in this capacitor?
A) 70 ?J
B) 80 ?J
C) 90 ?J
D) 100 ?J
E) 110 ?J
C
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If two atoms appear in the same column of the periodic table they will
a. form similar compounds. b. have similar physical characteristics. c. have similar melting points. d. do all of the above. e. do only (a) and (c) above.
Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. The magnitude of the surface charge density on either of the facing surfaces is 2.0 nC/m2 . Determine the magnitude of the electric potential difference between the plates
a. 36 V b. 27 V c. 18 V d. 45 V e. 16 V
The notation s?1 means the same thing as
a. 1/s. b. Hz. c. per second. d. none of the above
At target practice, a rifle bullet is fired at an angle of 30° below the horizontal with an initial velocity of 800 m/s from the top of a cliff 80 m high
How far from the base of the cliff does it strike the level ground below if air resistance is negligible?