If the Moon rose tonight at 6 PM, then tomorrow it will rise about:
A) the same time.
B) 7 PM.
C) 5 PM.
D) dawn.
E) midnight.
B
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Compared to the Earth, the moon is no longer geologically active because
a. it is rotating too slowly. b. its radioactive elements were never abundant. c. it is much smaller in mass. d. its crust is too thin. e. it does not have water on its surface.
The general formula RNH2 is that of
a. an ester. b. an amine. c. an amide. d. none of these
The electric field just outside the surface of a hollow conducting sphere of radius 20 cm has a magnitude of 500 N/C and is directed outward. An unknown charge Q is introduced into the center of the sphere and it is noted that the electric field is still directed outward but has decreased to 100 N/C. What is the magnitude of the charge Q?
a. 1.5 nC b. 1.8 nC c. 1.3 nC d. 1.1 nC e. 2.7 nC
Light spreads out when it passes through a narrow slit because of
a. interference b. diffraction c. specular reflection d. diffuse reflection e. polarization