A system absorbed 210 J of heat and did 520 J of work. What is the change in internal energy of the system?

What is the measure of a change in an objects velocity?

What object a collides with object b and bounces back its final momentum is?

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.