A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. As the wave moves, its wavelength:
1.increases.
2.decreases.
3.stays constant.
3
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A white dwarf generates energy through ____
a. gravitational contraction b. hydrogen fusion c. helium fusion d. mass loss e. rapid rotation
Simple Pendulum: On the Moon, the acceleration of gravity is g/6. If a pendulum has a period T on Earth, what will its period be on the Moon?
A. T
B. T/
C. T/6
D. 6T
E. T/3
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 change in angular position, ??, during the 7-second period is
A. 21 rad, CW. B. 21 rad, CCW. C. 30 rad, CW. D. 30 rad, CCW. E. 39 rad, CCW.
A concave spherical mirror has a focal length of magnitude 20 cm. An object is placed 10 cm in front of the mirror on the mirror's axis. Where is the image located?
A) 20 cm behind the mirror B) 20 cm in front of the mirror C) 6.7 cm behind the mirror D) 6.7 cm in front of the mirror