Reddit a small block of mass m slides along the inner, frictionless surface of a vertical circular track. at point a the magnitude of the block’s acceleration is 2g. 3. what is the magnitude of the normal force on the block at point b?

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?