When an electron is formed from a gamma ray collision, a positron is also made

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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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).

Physics & Space Science

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

Physics & Space Science

An image is formed by a converging lens. Suppose the bottom half of the lens in covered, as shown

What happens to the image?

1.The image disappears. 2.The image fades. 3.The image rotates. 4.The image moves relative to the lens. 5.The top half of the image disappears. 6.The bottom half of the image disappears. 7.Nothing. 8.None of the above.

Physics & Space Science

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.

Physics & Space Science