Conductors: A thin spherical copper shell of radius 9.5 cm carries an excess charge of -4.2 nC. How many excess electrons are on (a) the outer surface of the shell, and (b) the inner surface? (e = 1.60 × 10-19 C)
What will be an ideal response?
(a) 2.60 × 1010 electrons (b) zero
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A 4.00 kg hollow cylinder of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. The acceleration of the center of mass of the cylinder is
A. 2.45 
B. 2.98
C. 3.35
D. 3.98
E. 4.05
A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the string is horizontal, the speed of the mass is 8.0 m/s. What is the magnitude of the force of the string on the mass at this position?
A. 16 N B. 17 N C. 21 N D. 11 N E. 25 N
In a Young's double-slit experiment, how many maxima occur between the 5th-order maxima?
a. 8 b. 9 c. 10 d. 25 e. Three more than the number of minima.
The temperature of a gas is increased while the volume is held constant. Does the pressure decrease, increase, or remain the same? Explain