The region of a shadow that is totally shaded is known as the _____
A) umbra
B) waxing crescent
C) penumbra
D) waxing gibbous
A
Physics & Space Science
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On the autumnal equinox, the Sun sets ________.
A. south of west B. south of east C. due east D. due west E. north of east
Physics & Space Science
The apparent visual magnitude of a star is a measure of the star's
a. size. b. intensity. c. distance. d. color. e. temperature.
Physics & Space Science
How much energy is released in the reaction 2H + 2H ? 4He? [m(2H) = 2.012102 u, m(4He) = 4.002603 u]
A) 20 MeV B) 18 MeV C) 13 MeV D) 12 MeV E) 36 MeV
Physics & Space Science
A probe in space continues in its motion due to
A) very low friction. B) its own inertia. C) it seeking a continued state of motion. D) none of the above
Physics & Space Science