Which quantity is a scalar quantity

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.

Which of the following statement is false

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?