_________emission occurs when a material is heated to a high temperature and electrons are emitted.
Fill in the blank(s) with the appropriate word(s).
Thermionic
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Quantum tunneling occurs in
a. nuclear fusion. b. radioactive decay by emission of alpha particles. c. the scanning tunneling microscope. d. all of the above. e. only (b) and (c) above.
Which of the following best represents the energy transformations occurring in a coal-fired power plant?
A) thermal ? chemical ? electric B) gravitational ? thermal ? electric C) chemical ? electric ? thermal D) chemical ? thermal ? electric E) electric ? thermal ? chemical
An object with a nonzero rest mass moving at the speed of light would have
A. time pass at an infinitely fast rate. B. infinite apparent mass. C. no momentum. D. infinite volume.
In alpha decay,
A) a proton turns into a neutron B) a neutron turns into a proton C) a proton turns into an electron D) a helium nucleus is ejected