Homework Help for Astronomy (page 3)
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according to the uncertainty principle, which of the following statements is true?
a) It is impossible to simultaneously determine both the position and the momentum of a particle with arbitrary accuracy.
b) It is impossible to simultaneously determine both the energy and the momentum of a particle with arbitrary accuracy.
c) It is impossible to measure the position of a particle with arbitrary accuracy in a finite amount of time.
d) It is impossible to simultaneously measure both the energy and position of a particle with arbitrary accuracy.
e) It is impossible to determine a particle's energy with arbitrary accuracy in a finite amount of time.
which of the following statements about the cosmic background radiation is not true?
(a) It has a temperature of about 3 degrees K about absolute zero.
(b) It is the result of moisture of radiation from many independent sources, such as stars and galaxies.
(c) It had a much higher temperatures in the past.
(d) It is isotropic.
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