Hi please answer these two questions. Is a rolling pin an example of a wheel and axle?

Are stairs considered an inclined plane or a wedge?

Thank you! (Will give brainliest and report any links or irrelevant answers.)

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.

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

What’s #16 asking me and how do i solve it?