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Author Question: An electron and a positron (antielectron), both nearly at rest, collide. What particle(s) is(are) ... (Read 153 times)

Pea0909berry

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on: Jul 28, 2018
An electron and a positron (antielectron), both nearly at rest, collide. What particle(s) is(are) produced?
 a. One photon of energy 1.02 MeV
  b. Two photons of energy 511 keV
  c. A pi-meson
  d. A K-meson and an anti-neutrino

Question 2

On March 21, the noonday Sun is overhead at what latitude?
 a. 0
  b. 23.5N
  c. 23.5S
  d. That of the Tropic of Cancer


Liamb2179

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Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

a


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