Imagine that you’re observing a collision. which action would allow you to determine whether the collision is inelastic?

measure the force of impact.
observe whether the colliding objects change their shape.
measure the acceleration of the colliding objects.
measure the mass of the colliding objects.

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?

Derive the formula 2as=v² -u² where the formula have have usual meanings

Which of the following is most likely to be the best conductor of electricity? oxygen chlorine aluminum chromium