The density of air is 1.3kg/m3 . find the mass of air in a room measuring 8m x 5m x 4m . please answer me..​

Asample of a gaseous substance changes into a liquid

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?