Which of the following is not a possible energy source for a steam-electric generating plant?
A) fossil fuels
B) wood
C) solar energy
D) fissionable material such as uranium
E) All of the above are possible energy sources.
E
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A 1 000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest. If the two stick together, what is the velocity in m/s of the two cars after the collision according to an observer in a truck moving 10 m/s in the same direction as the moving cars?
a. 6 b. 11 c. 24 d. 26 e. 31
The angle between two plane mirrors that meet at one edge is 45°. The change in direction of a ray that strikes the first mirror at a 60° angle of incidence when that ray reflects from the second mirror is
a. 0°. b. 45° c. 90° d. 150° e. 270°
The electric field created by a moving negative charge
A. describes concentric circles about the direction of motion. B. points in the direction opposite to the velocity. C. points in the direction of motion. D. points away from the charge. E. points toward the charge.
The light directly from the Sun is
a. polarized. b. unpolarized. c. horizontally polarized. d. vertically polarized.