Why do scientists believe the universe is still expanding

In the derivation of rrkm theory, a factor of 1/2 is introduced when equalizing the rates of formation and decomposition of activated complex as keal-hr) = ko this is clearly against the assumption of transition state theory that states all the activated complex in the transition state iss going to the product. find the reason why this factor is introduced here.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Convection occurs when thermal energy is transferred by the movement of