Applied Mechanics and Graphic Statics
The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface

Uneven distribution of the gravitational field
None of these
Gravity of the sun and the moon
Aerodynamic forces

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Applied Mechanics and Graphic Statics
The following is in unstable equilibrium

A uniform solid cone resting on a generator on a smooth horizontal plane
A uniform solid cone resting on its base on a horizontal plane
A satellite encircling the earth
A solid cube resting on one edge

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