A certain crystal has an interatomic spacing of 0.442 nm. A beam of neutrons moving with a speed of 1640 m/s is diffracted from the crystal. What is the de Broglie wavelength of the neutron?
A) 0.121 nm
B) 0 nm
C) 0.241 nm
D) 0.484 nm
E) 0.682 nm
C
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Answer the following statement(s) true (T) or false (F)
1. We cannot experimentally determine the actual value of a system’s total energy 2. A system of two noninteracting particles might have a negative total energy E.
If a planet is seeing its Moon in the New Phase right now, in what phase would the planetappear to be when viewed from its Moon?
a) Third Quarter Planet b) Full Planet c) New Planet d) You can't see the planet from its Moon e) First Quarter Planet
Neglecting air resistance, a bullet fired straight down from the top of a high cliff has an acceleration of
A) less than 10 m/s2. B) 10 m/s2. C) more than 10 m/s2. D) depends on the height of the cliff.
Which of the following is a consequence of Heisenberg's uncertainty principle?
A) The unpredictability of radioactive decay. B) The uncertainties involved in determining a person's genetic inheritance when DNA molecules are combined. C) The fact that atoms don't collapse. D) All of the above. E) None of the above.