A 5.0-nC point charge is embedded at the center of a nonconducting sphere (radius = 2.0 cm) which has a charge of ?8.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point that is 1.0 cm from the center of the sphere?
a. 1.8 × 10^5 N/C
b. 9.0 × 10^4 N/C
c. 3.6 × 10^5 N/C
d. 2.7 × 10^5 N/C
e. 7.2 × 10^5 N/C
c
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While the gondola is rising at a speed of 5.0 m/s, a passenger in a balloon-supported gondola throws a small ball up at a speed of 2.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is
a. 2.0 m/s, up. b. 2.8 m/s, down. c. 3.0 m/s, up. d. 5.0 m/s, up. e. 7.0 m/s, up.
A primary current of 6.0 A exists in an ideal iron-core transformer at a primary voltage of 100 volts. If the current in the secondary is 0.75 A, calculate the output voltage
a. 12.5 V b. 40 V c. 400 V d. 800 V e. 200 V
The nuclear bulge of our galaxy
a. contains stars that are primarily population I stars. b. is primarily composed of gas and dust. c. contains stars primarily associated with the spherical component of our galaxy. d. contains stars primarily associated with the disk component of our galaxy. e. a, b and d
Unpolarized light is incident upon two polarization filters that do not have their transmission axes aligned. If of the light passes through this combination of filters, what is the angle between the transmission axes of the filters?
A) 53° B) 73° C) 85° D) 80°