Energy transfers from one substance to another when molecules collide.
True
False

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Asystematic approach to problem solving is called a (an)

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?