Aprojectile of mass 100 kg is shot from the surface of earth by means of a very powerful cannon. if the projectile reaches a height of 65,000 m above earth's surface, what was the speed of the projectile when it left the cannon? (mass of earth 5.97x10^24 kg, radius of earth 6.37x10^6 m)

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?

Asimple electrochemical cell contains two electrodes? t or f