Suppose you were to try to create a proton-antiproton pair by annihilation of a very high energy photon. The proton and the anti-proton have the same masses, but opposite charges. What energy photon would be required?
A)
1.022 MeV
B)
12.2 MeV
C)
1880 MeV
D)
940 MeV
E)
223 MeV
C
Physics & Space Science
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The mass of a single galaxy might be found by
a. the double galaxy method. b. the rotation curve method. c. the cluster method. d. any of these methods. e. none of these methods.
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Scientific Notation: Write out the number 8.42 × 10-5 in full with a decimal point and correct number of zeros.
A. 0.00000842 B. 0.0000842 C. 0.000842 D. 0.00842
Physics & Space Science
Text boxes, check boxes, and option buttons are all elements of what type of web tool?
A. forms B. comments fields C. databases D. login pages
Physics & Space Science
One light year is about 10 trillion kilometers
Indicate whether the statement is true or false
Physics & Space Science