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September 3, 2015

Homework Help: Physics please help ASAP!

Posted by Bobby on Monday, March 31, 2014 at 11:20pm.

If you know the mass of a star and a planetís radius and speed at perihelion (closest approach to the star), then using conservation of energy and angular momentum you can solve for the radius and speed of that planet at aphelion (farthest point from the star).
Enckeís comet has speed 7.0x104
m/s at its closest distance to the Sun (5.1x1010 m, about a third of the distance from the Earth to the Sun). What is its speed and distance from the
Sun at aphelion?

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