Which statement about matter is correct? a) in matter, molecules never stop moving. eliminate b) in the solid state, molecules stop moving. c) pressure and temperature do not affect matter. d) liquids have a lower level of energy than solids.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

If forces acting on an object are unbalanced. true or false

Which statement is true about an object that is moving in a circular motion due to centripetal force, f, when the radius of its circular motion is doubled? the new force then becomes equal to 2f the new force then becomes equal to f the new force then becomes equal to f/2 the new force then becomes equal to f2 the new force then becomes equal to 1/f