Which of the following is true? a. the earth exerts a gravitational force on the moon, but the moon does not exert a gravitational force on the earth. b. the moon exerts a gravitational force on the earth, but the earth does not exert a gravitational force on the moon. c. the earth and moon do not exert gravitational forces. d. the earth and moon both exert a gravitational force on each other.

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

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.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?