Calculate the speed of a beam of neutrons produced in a nuclear reactor, having kinetic energies of 1.0 MeV. The rest mass of neutrons is 939 MeV/c2
A. 799 m/s
B. 640 km/s
C. 320 km/s
D. 24.5 km/s
B. 640 km/s
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For a selected atom in a sample of a radioactively decaying isotope, the probability that it will decay during a time interval of a specified length is
A. dependent on how long ago t=0 was set. B. independent of when the time interval starts relative to the current time. C. dependent upon how old the atom is. D. fundamentally unpredictable.
The specific heat of water is 1.000 cal/gm 
What is the specific heat of water in the mks system of units?
A. 2,124 J/kg 
B. 2,765 J/kg
C. 3,417 J/kg
D. 3,764 J/kg
E. 4,186 J/kg
The wave function of an electron in a rigid box (infinite well) is shown in the figure. If the electron energy 98.0 eV, what is the energy of the electron's ground state? (mel = 9.11 × 10-31 kg)
A) 6.13 eV B) 3.92 eV C) 10.9 eV D) 24.5 eV
Based on our current understanding of physics, we can understand the conditions that prevailed in the early universe as far back in time as about ________
A) 10 billion years ago B) 10-45 seconds after the Big Bang C) one ten-billionth of a second after the Big Bang D) 380,000 years after the Big Bang