A 200-Hz and a 206-Hz sound are emitted into the same volume of space. What is the frequency of intensity variation?
A)
406 Hz
B)
41.2 kHz
C)
6 Hz
D)
1.03 Hz
E)
203 Hz
C
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A rock's initial melting temperature is primarily determined by
A) the rocks mineralogy. B) its water content. C) its internal temperature. D) its heat source.
If the Sun instantaneously shrunk dramatically in size but retained the same mass, what would happen to the Earth?
A) Earth's orbit would be unchanged. B) Earth would gradually spiral into the shrunken Sun. C) Earth would be ejected from the solar system. D) Earth would be rapidly sucked into the shrunken Sun.
In making a transition from state n = 1 to state n = 2, the hydrogen atom must
A) absorb a photon of energy 10.2 eV. B) emit a photon of energy 10.2 eV. C) absorb a photon of energy 13.58 eV. D) emit a photon of energy 13.58 eV.
Radiometric dating assumes that, once a mineral has crystallized, any daughter product results only from the decay of the original unstable parent. Some complications are
A) variations in temperature. B) failure to take samples too close together. C) "time clock resetting" due to metamorphism, and product leakage that yields false age estimation. D) a poorly maintained teleometer.