Halley's comet has an elliptical orbit around the Sun with a period of 76.0 years. At its closest approach (perihelion) it is 8.82 × 1010 m from the Sun and has a speed of 54.6 km/s
How fast is it moving at its furthest point from the Sun (aphelion)? The mass of the Sun is 2.00 × 1030 kg and G = 6.67 x 10-11 N•m2/kg2. A) 604 m/s
B) 802 m/s
C) 1070 m/s
D) 1540 m/s
E) 1860 m/s
B
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Eternal Inflation refers to
A) the possibility that our universe is only a patch of a greater universe and that the process of universe spawning will continue forever. B) the observation that cosmic inflation could eventually curve back in on itself, causing its opposite: the compression of space. C) cosmic inflation inflating itself such that its own inflation is self-generating. D) the presence of a distinct beginning of time.
The neutron decays into a proton, electron, and an electron antineutrino. Into what does the antineutron decay?
A. a proton, positron, and electron antineutrino B. an antiproton, positron, and electron neutrino C. a proton, electron, and electron antineutrino D. an antiproton, electron, and electron neutrino E. an antiproton, electron, and electron antineutrino
Describe four effects that helped to clear the solar nebula
What will be an ideal response?
The masses of all the planets combined is about 1% of that of the Sun
Indicate whether the statement is true or false