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Physics
Physics
Problem
(a) A comet orbits the Sun in an elliptical orbit. A and B are two positions of the comet. (b) An asteroid (minor planet) orbits the Sun in a circular orbit of radius
4.5
×
10
8
4.5 \times 10^8
4.5
×
1
0
8
km. The radius of Earth's orbit is
1.5
×
10
8
1.5 \times 10^8
1.5
×
1
0
8
km.
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