You can see your image in a mirror because of
a. interference.
b. diffraction.
c. specular reflection.
d. diffuse reflection.
e. polarization.
c
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How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?
A) It should have a higher fraction of elements heavier than hydrogen and helium. B) It should be much brighter. C) It should be higher in mass. D) It should orbit the galactic center at a much higher rate of speed. E) All of the above would be expected.
A 1.00-kg ball has zero kinetic and potential energy. Ernie drops the ball into a 10.0-m-deep well. Just before the ball hits the bottom, the sum of its kinetic and potential energy is:
a. zero. b. 98.0 J. c. ?98.0 J. d. 196 J. e. ?196 J.
Air moves toward a low-pressure region where it
A) sinks. B) rises. C) warms. D) stops.
Measurements of the magnetic field of Venus reveal that the
a. planet has a large iron core. b. interior of the planet is molten. c. planet has no detectable magnetic field. d. planet rotates backwards. e. magnetic field is responsible for large auroral displays (northern lights) on Venus.