True or false The expression that relates emf, potential, current, and resistance is Ohm's law.

In terms of energy, how would you classify the following chemical reaction? 2Cu + O2 + 315 KJ---> 2CuO A. endothermic B. exothermic C. both endothermic and exothermic D. Neither endothermic nor exothermic

An engine has a hot-reservoir temperature of 980 K and a cold-reservoir temperature of 570 K. The engine operates at three-fifths maximum efficiency. What is the efficiency of the engine?

What isn't a charecteristic of the part of the atom A?

Is glass an insulator

A cow's mass is 410 kg and a car's mass is 565 kg. What is the difference between their weights? A. 1470 N B. 1520 N C. 1540 N D. 1500 N

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.

All objects are attracted to each other by the force of a. weight. b. mass. c. inertia. d. gravity.

landslides and mudslides caused by lava flows are ___ deadly than the lava flow itself. a. more b. less

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor