Witch is the fastest way to send information, useing sound waves, light waves, or water waves

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?

If the wavelength is tripled, while the speed of the wave is held constant, what happens to the frequency?

Luis is installing some 12-gage wire. how much resistance will there be throughout a distance of 400 feet?