Ashopper in a supermarket pushes a loaded 31 kg cart with a horizontal force of 12 n. the acceleration of gravity is 9.81 m/s 2 . a) disregarding friction, how far will the cart move in 4.2 s, starting from rest? answer in units of m.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !