Suppose a log's mass is 5 kg. after burning, the mass of the ash is 1 kg. explain what may have happened to the other 4 kg.

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

Describe uniform velocity and variable velocity in short

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?