A lens with f= 20.0 cm creates a virtual image at -37.5 cm (in front
of the lens). What is the object
distance?

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.

More solar radiation is absorbed by earth’s surface than by

This is the number of complete movements of a wave per second.