What do active solar heat systems have that passive systems do not have?.

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)