A 165 kg boulder is perched on the edge of a cliff that is 27 m high. If the boulder falls over the edge of the cliff, what will be its velocity just before it hits the ground at the base of the cliff?

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.