The orbital period of a geosynchronous satellite is
A) the same as Earth's precise rotation period.
B) the same as the Moon's precise orbital period around Earth.
C) the same as Earth's orbital period around the Sun.
D) about 12 years.
E) about 26,000 years.
A) the same as Earth's precise rotation period.
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When a comet is in the inner solar system, what part of it points most directly away from the Sun?
A) the denser side of its nucleus B) its coma C) jets of gas emerging from its nucleus D) its tail
Two waves travel simultaneously through the same medium. The first wave is described by y1(x,t) = (2.00 cm)cos[kx-?t] and the second wave by y2(x,t) = (3.00 cm)cos(kx-?t+?). If the resulting wave has an amplitude 4
00 cm, what is a possible value of ?? A) 0.782 rad B) 0.250 rad C) 0.644 rad D) 0.833 rad E) 1.32 rad
Free-fall motion neglects ______________
Fill in the blank(s) with correct word
Which of the following statements is an inference from a model (rather than an observation)?
A) The photosphere emits visible light. B) The Sun emits neutrinos. C) The Sun's core is gradually turning hydrogen into helium. D) The corona is hotter than the photosphere. E) The photosphere is made out of mainly hydrogen and helium.