An object is placed 10 cm in front of a concave mirror with a 20-cm focal length. Determine the image location (in cm)
a. ?20
b. ?15
c. ?10
d. ?5
e. 6.7
a
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A Coulomb per second is the same as
A) a watt. B) an ampere. C) a volt-second. D) a Coulomb. E) a volt per second.
The rotation of Uranus is peculiar in that
a. it is very slow, nearly zero. b. it is much faster than is typical for Jovian planets. c. it first turns in one direction, then stops and turns in the opposite direction. d. the axis is nearly parallel to the plane of its orbit.
Now consider Object 2. What can you say about Object 2 in comparison to Object 1?
A) Object 2 is moving away from us faster than Object 1. B) Object 2 contains more hydrogen than Object 1. C) Object 1 had a higher temperature than Object 2. D) Object 2 is moving toward us while Object 1 is moving away from us.
An unstable particle is moving at a speed of 2.6 × 108 m/s relative to a laboratory. Its lifetime is measured by a stationary observer in the laboratory to be 4.7 × 10-6 seconds
What is the lifetime of the particle, measured in the rest frame of the particle? (c = 3.00 × 108 m/s) What will be an ideal response?