Need the answers ASAP If a planet is in a circular orbit around a star, what is

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Need the answers ASAP

If a planet is in a circular orbit around a star, what is the torque produced by the force of gravity on the planet? Assume the star and planet are isolated, so there is no other source of gravitational force. It depends on the radius of the orbit and the mass of the planet. Zero Constant but nonzero An increasing torque A decreasing torque A comet travels in a high-eccentricity elliptical orbit around the Sun, When the comet is at the point of CLOSEST approach to the Sun: Kinetic energy is minimum, potential energy is minimum, total energy is minimum Kinetic energy is maximum, potential energy is minimum, total energy is constant Kinetic energy is maximum, potential energy is maximum, total energy is maximum Kinetic energy is minimum, potential energy is maximum, total energy is constant

Explanation / Answer

a. zero

b. max KE and Min PE and total eenrgy is constant

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