I would like to know why this is the correct answer -A paper pinwheel is spinning in the wind. Which statement is correct about the forces responsible for the rotation?

*The perpendicular components of gravity and the force of wind are responsible for the rotation

The energy released by a nuclear fusion reaction is produced when

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?