Suppose that the energy difference between adjacent energy levels for an oscillator in an Einstein solid is ? = 0.005 eV. At room temperature, the value of T/TE is
A. quite a bit smaller than 1
B. about equal to 0.5.
C. about equal to 1.
D. about equal to 2.
E. quite a bit larger than 2.
F. One doesn’t have enough information to tell.
E. quite a bit larger than 2.
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Gravitational lensing
a. occurs when light passes near a massive object and is deflected by the object's gravitational field. b. can be used to determine the luminosity of a galaxy. c. occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy. d. occurs when the mass of a galaxy is less than expected from the luminosity of the galaxy. e. can be used to determine the recessional velocity of a galaxy.
A rock that weighs 100 lb on Earth is taken to the Moon. Which of the following statements accurately describes what would be observed?
A. The rock is easier to lift because its weight is less on the moon B. The rock is more difficult to lift because the Moon's radius is less than Earth's C. The rock is just as difficult to lift on the Moon as it is on Earth because its mass hasn't changed D. The rock is easier to lift because its mass is less on the moon
Absolute zero corresponds to a temperature of
A) 0 K. B) -273° C. C) both of these D) none of the above
Which of the following actions will increase the speed of sound in air?
1.decreasing the air temperature 2.increasing the frequency of the sound 3.increasing the air temperature 4.increasing the amplitude of the sound wave 5.reducing the pressure of the air