A soccer ball of mass 0.5 kg, initially at rest, is kicked by a force of magnitude 1000 N for 0.015 s. What is the velocity of the ball after the kick? A. 0 m/s
B. 15 m/s
C. 7.5 m/s
D. 30 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?