The law of conservation of energy can be applied? A)as long as no friction is present

B)as long as all the forms of energy are mechanical

C)only if heat is not produced

D)under all normal situations

Which two particles are found in the center of an atom

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

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?