a table tennis ball is dropped onto a floor from a height of 4m and it bounces to a height of 3m. if the time of contact with the floor is 0.01s what is the magnitude and direction of the acceleration during contact​

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.

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?