How do coal power plants and nuclear power plants differ?
A) One has a stack--i.e., smokestack--and the other doesn't.
B) They use different fuels.
C) Both of the above.
D) One uses a cooling tower or a cooling lake or river, and the other doesn't.
E) All of the above.
C
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Suppose it were possible to drill a frictionless cylindrical channel along a diameter of the Earth from one side of the Earth to another. A body dropped into such a channel will only feel the gravitational pull of mass within a sphere of radius equal to the distance of the mass from the center of the Earth. The density of the Earth is 5.52 × 10^3 kg/m3 and G = 6.67 × 10^?11 N/m2/kg2 . The
mass will oscillate with a period of a. 84.4 min. b. 169 min. c. 24.0 h. d. 1 130 h. e. 27.2 d.
A 5-kg fish swimming at 1 m/s swallows an absent-minded 1-kg fish at rest. The speed of the larger fish after lunch is
A) 1/2 m/s. B) 2/5 m/s. C) 5/6 m/s. D) 6/5 m/s. E) 1 m/s.
Maxwell guessed that visible light was an electromagnetic wave because of its:
a. energy. c. wavelength. b. frequency. d. speed.
A Schottky defect in an ionic material is a cation and anion _____________.
Fill in the blank(s) with the appropriate word(s).