The faintest star visible to the naked eye has an apparent magnitude of about
A) 6. B) -1. C) 1. D) 0. E) 10.
A
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If 30 kJ of heat flows out of a system and 15 kJ of work is done by the system, then what is the change in internal energy?
A. 85 kJ B. 70 kJ C. 45 kJ D. 15 kJ E. 10 kJ
A thermal neutron has an energy (in eV) on the order of
a. 40 b. 0.4 c. 4 d. 0.04 e. 400
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.
Inside the nucleus, the weakest of the four fundamental forces is
A) the electromagnetic force. B) the gravitational force. C) the weak nuclear force. D) the strong nuclear force.