If you understand lmk thanks

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is