Apitcher throws a baseball at 45 m/s. the baseball has a mass of 400 grams. disregarding air resistance, the baseball's momentum when it hits the catcher's mitt is a0 kg*m/s.

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?