Tom runs 2000 feet around a track in 4 minutes. Which answer shows the correct equation to determine grandma's speed? 2000 x 4 = 8,000 feet per minute
2000 / 4 = 500 feet per minute
4 / 2000 = 0.002 feet per minute
500 x 4 =2000 feet per minute

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.

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical