How do scientists determine how long ago Earth first formed?
A) radiometric dating of meteorites
B) radiometric dating of Moon rocks
C) radiometric dating of the oldest Earth rocks
D) Models of planetary formation tell us how long it took Earth to grow to its present size.
A) radiometric dating of meteorites
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If the frequency of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum acceleration of the oscillator change?
A) 2 B) 4 C) 1 D) 1/2 E) 1/4
What is the value of n in the Balmer series for which the wavelength is 410.2 nm?
A) 4 B) 5 C) 6 D) 7 E) 9
When the Sun moves off the main sequence, it will next become a _______________
a. red giant b. dwarf star c. white dwarf d. black hole
The separations of objects on the celestial sphere can be measured in units of
a. miles. b. kilometers. c. light years. d. parsecs. e. angle (such as degrees).