In a harmonic oscillator with an angular frequency of 5 rad / s, the mass is pulled 2 m from the equilibrium position. Mass t = 0 if at the time x = 1 m; a) Find the phase difference
b) Determine the position equation of the solution of harmonic motion as a function of time.

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?