What does friction have to do with energy losses?

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

Which type of basaltic lava flow has a fairly smooth

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this