Tritium is radioactive with a half-life of 12.33 years decaying into 3He with low-energy electron emission. If we have a sample of 1.91 × 10^18 tritium atoms, what is its activity in decays/second? (1 year = 3.15 × 10^7 s)
a. 4.92E+9 decays/second
b. 3.41E+9 decays/second
c. 1.07E+17 decays/second
d. 6.69E+16 decays/second
e. 3.41E+10 decays/second
b
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True or False: A photon is reflected from a mirror. Although the photon has energy, it can't transfer any energy to the surface because it has zero mass
1.True 2.False
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Answer the following statement true (T) or false (F)