When an electron is formed from a gamma ray collision, a positron is also made
Indicate whether the statement is true or false
TRUE
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When is an elevator a reasonably good inertial reference frame?
A. Never, under any circumstances. B. Always, since it is attached to the surface of the earth. C. It is good except when it is changing speed. D. Other conditions (describe).
What do you do to the control rods of a reactor in order to shut it down?
a. push them into the core b. pull them out of the core c. nothing—it's the cooling water that shuts down the reactor d. none of the above
An image is formed by a converging lens. Suppose the bottom half of the lens in covered, as shown
What happens to the image?
The experimental observation(s) below that require(s) a quantum explanation for the photoelectric effect
a. is that more photoelectrons are emitted when the light frequency increases. b. is that the maximum kinetic energy of the photoelectrons is related linearly to the frequency of the light. c. is that every metal surface has a work function, a minimum amount of energy needed to free electrons. d. is that the stopping potential measures the kinetic energy of the photoelectrons. e. are all of the above.