Helium always has two neutrons in its nucleus
Indicate whether the statement is true or false
F
Physics & Space Science
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The equator receives the same amount of sunlight from season to season
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
A ray of light moves from air into water. Which path most accurately shows the refraction?
A. A B. B C. C D. D E. E
Physics & Space Science
A light ray bends when it goes from one medium to another because of __________
Fill in the blank(s) with correct word
Physics & Space Science
The rest energy of an electron and its antiparticle, a positron, is 0.511 MeV. In order to produce an electron-positron pair, a gamma ray must have an energy larger than 1.022 MeV because of
a. time dilation b. length contraction c. the equivalence of mass and energy d. the principle of relativity e. none of the above
Physics & Space Science