A "megawatt" is
A) 1,000,000 watts.
B) 1,000,000,000 watts.
C) 1000 watts.
D) 100 watts.
E) None of the above.
A
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What is the wavelength from a radio station having frequency 107.7 MHz?
A. 2.790 m B. 27.90 m C. 32.30 m D. 323.0 m E. 108.0 m
What is the giant impact hypothesis for the origin of the Moon?
A) The Moon formed from material blasted out of the Earth's mantle and crust by the impact of a Mars-size object. B) The Moon formed when two gigantic asteroids collided with one another. C) The Moon originally was about the same size as Earth, but a giant impact blasted most of it away so that it ended up much smaller than Earth. D) The Moon formed just like the Earth, from accretion in the solar nebula.
The escape speed from the moon is what fraction of Earth's escape speed? (Earth/Lunar mass ratio = 81.3; Earth/Lunar radius ratio = 3.67)
A) 0.045 B) 0.17 C) 0.61 D) 0.41 E) 0.21
Classify the following statement as a characteristic
(a) of electric forces only, (b) of magnetic forces only, (c) of both electric and magnetic forces, or (d) of neither electric nor magnetic forces. The force exerted on a stationary charged object is nonzero.
1.electric forces 2.magnetic forces 3.both electric and magnetic forces 4.neither electric nor magnetic forces