The age of the solar system can be established by radioactive dating of
A) the atmosphere of Mars.
B) the oldest meteorites.
C) the oldest rocks on Earth.
D) the oldest rocks on the Moon.
E) It hasn't been done yet, but the age of the solar system could be obtained from a sample of Io's surface.
B
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I take two pictures of my dog Kaycee. I use the same film and level of illumination for both pictures, but I quadruple the f-number for the second picture. By what factor will the required time of exposure change if the film is to receive the same total light energy?
a. 0.06 b. 0.25 c. 4.0 d. 16.0 e. 3.0
What is the least count of your hand calibrated thermometer?
Falling objects [dropped near the earth's surface, neglecting air resistance] all fall at
A) an acceleration that is larger for more massive objects. B) the same constant [or unchanging] acceleration. C) zero acceleration. D) the same constant [or unchanging] velocity. E) the same constant (or unchanging) speed.
The rotation period of Uranus was measured through:
A) observations of the motions of its satellites. B) observations of the features on its cloud surface. C) observations of radio signals associated with its magnetosphere. D) observations of its motion around the Sun. E) observations of Neptune's motion around the Sun.