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

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The apparent visual magnitude of a star is a measure of the star's

a. size. b. intensity. c. distance. d. color. e. temperature.

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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

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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

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