An airplane traveled for 15 hours at a velocity of 1100 km/hr. What distance did the airplane travel. *
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Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

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.