The spring constant = 31 N/m, the spring's compression is 0.04 m, the ball's mass is 0.017 kg, the height of the ramp is 10 cm, theta is 35 °and the top of the table is 0.9 m above the floor. With what speed will the ball hit the floor?

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?