The work done in the expansion from an initial to a final state
a. is the area under the curve of a PV diagram.
b. depends only on the end point.
c. is independent of the path.
d. is the slope of a PV curve.
e. equals P(VF ? Vi).
a
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A convex lens has a focal length f. An object is placed between infinity and 2f from the lens along a line perpendicular to the center of the lens. The image is located at what distance from the lens?
A) between the lens and f B) farther than 2f C) between f and 2f D) 2f E) f
In a closed universe a beam of light will:
A) come back to where it originated. B) continue on forever. C) move on a circular path around its origin. D) reflect off the edge of the universe and come back. E) go on some strange path, never to return.
Exhibit 12-3
The graph below shows a plot of angular velocity in rad/s versus time in s from t = 0 s to t = 7 s.
?
?
Use this exhibit to answer the following question(s).
Refer to Exhibit 12-3. The angular position, ?, at t = 0 s is 3.0 rad, clockwise. The angular position, ?, at t = 7 s is
A. 27 rad, CW. B. 27 rad, CCW. C. 33 rad, CW. D. 33 rad, CCW. E. 36 rad, CCW.
If you toss a ball straight upward at 40 m/s, with no air resistance it returns to you at a speed of
A) zero. B) 10 m/s. C) 40 m/s. D) more than 40 m/s.