2. A piece of wood is burned, and a small amount of ashes are formed. Explain why the original piece of wood and the resulting ashes will not weigh the same.

Aman does 500 j of work pushing a car a distance of 2 m. how much force does he apply? assume there is no friction. a. 250 n b. 1000 n c. 125 n d. 500 n

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.

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?