It is true that in centrifugation: Group of answer choices molecules that are more dense will end up in the pellet while less dense molecules will be suspended in the supernatant the particle that would move faster in velocity centrifugation would be round and square large molecules diffuse faster than small ones

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.