Explain whether smoke filling up a room is diffusion or not

Smoke filling up a room is a diffusion. Diffusion occurs when two or more sets of molecules intermingle and spread out. In this situation, it would be the smoke molecules interacting and spreading out among the air molecules.

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

Wavelength divides in half and speed stays the same.