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Unformatted text preview: d the cesium plate. The maximum
kinetic energy of an emitted electron is
D. 29. 4.1 eV
0.0 eV The Compton experiment was significant in that it demonstrated that photons have
D. 30. mass
a speed of 3.00 × 108 m/s An experiment starts with 1.45 kg of iodine-131. After 32.2 days, 90.6 g are
left. The half-life of iodine-131 is
A. 32.2 days B.
D. 16.1 days
4.04 days 19
19 Use the following information to answer the next four questions.
Interest in nuclear fusion is growing because of the amount of energy
available from nuclear reactions. A major difficulty in producing a nuclear
fusion reaction is that in order for nuclei to fuse, the nuclei must possess a
large amount of kinetic energy. Under most circumstances, 0.25 MeV per
nucleus is sufficient. At such high energies, the nuclear fuel is called a
The average kinetic energy of a nucleus within a plasma can be found using
Ek = 3 bT
where T is the...
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- Fall '09