A spaceship, traveling at 0.100c away from a stationary enemy station, shoots a projectile towards the station, with a speed of 0.560c relative to the spaceship. What is the speed of the projectile relative to the station?
A) 0.460c
B) 0.487c
C) 0.492c
D) 0.492c
E) 0.660c
B
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A cylinder, of radius 8.0 cm, rolls 20. cm in 5.0 s. Through what angular displacement does the cylinder move in this time?
What will be an ideal response?
Two bulbs are shown in a circuit that surrounds a region of increasing magnetic field directed out of the page. When the switch is open,
a.
bulb 1 is glowing; bulb 2 is dark.
b.
bulb 2 is glowing; bulb 1 is dark.
c.
both bulbs glow equally brightly.
d.
both bulbs glow one half as brightly as they do with the switch closed.
e.
both bulbs are dark.
The gravitational force is a conservative force
Indicate whether the statement is true or false
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°