In Figure 9.1, the time t, when P returns to the original position on the x-axis, is closest to:
A) 13 s
B) 18 s
C) 25 s
D) 35 s
E) 50 s
D
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A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular speed of 200 revolutions per minute, then the tangential velocity of a point on the circumference is
A. 1.76 m/s. B. 1.54 m/s. C. 1.41 m/s D. 1.26 m/s. E. 1.07 m/s.
Astigmatism is usually due to
A) the cornea or lens being out of round. B) accommodation. C) myopia. D) missing rods. E) hyperopia.
When the velocity and acceleration of an object have opposite signs, the speed of the object increases
Indicate whether the statement is true or false
The fact that the binding energy per nucleon does not depend very strongly on the volume of the nucleus indicates that
a. the strong nuclear force saturates. b. nucleons don't move throughout the nucleus. c. all nuclei have the same volume. d. the radius of a nucleus is directly proportional to the number of nucleons.