What do wind turbines, hydroelectric dams, and ethanol plants have in common? A. All produce electrical current without pollution. B. All use generators to produce electrical current. C. All convert gravitational potential energy to electrical current. D. All convert thermal energy to electrical current.

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

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?

Did anyone do 1.06 lab: cloud formation i need with it i go to k12 lavcame i need to get it done quick