What is the binding energy per nucleon of 197Au (atomic number = 79)? (The following information regarding atomic masses will be needed: 197Au, 196.966 543 u; hydrogen, 1.007 825 u; neutron, 1.008 665 u; also 1 u = 931.5 MeV/c2)
a. 931 MeV
b. 745 MeV
c. 7.92 MeV
d. 1870 MeV
c
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A nucleus undergoes beta decay. Which of the following statements is true?
A. The daughter element has the same number of protons as the parent. B. The daughter element has fewer protons than the parent. C. Both daughter and parent elements have the same atomic number. D. The daughter element has more protons than the parent.
An refrigerator keeps food in the freezer portion at 
and dumps excess heat into the kitchen, whose temperature is 
If the refrigerator has half the coefficient of performance of an ideal reversible refrigerator, and if its motor can supply 250W of power, what is the rate of heat flow into the kitchen?
A. 950W B. 910W C. 625W D. 150W
If a particle in a box has a ground-state energy of 10.0 eV, what is the energy of the 4th excited state?
A. 20.0 eV B. 40.0 eV C. 160 eV D. 50.0 eV E. 250 eV
Why does the Moon appear reddish during a total lunar eclipse and not go completely dark?
What will be an ideal response?