The aurora borealis is caused by the . A. mesosphere
B. stratosphere
c. thermosphere
D. troposphere

For which pair of objects would adding the same a

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.

This is the number of complete movements of a wave per second.