What is the recommended amount of time that a teenager should be participating in physical activity a: 30 min b: 60 min c: 45 min d: 15 min

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 speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering