If there is a cotton ball on a spoon and you pull the spoon half way back and all the way back, which one would led the ball to going further, the half way back or all the way back? Please also add why and no links please!

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

An object has a weight of 500 on earth what is the mass of this object

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.