You are the engineer asked to design a rapid sand filtration system for a small water treatment plant. it has the following characteristics: hydraulic loading rate = 6 m/h total volumetric flow rate of the plant = 3 mgd effective filtration rate = 5.8 m/h production efficiency = 97% complete (filtration, rinsing, and backwashing) filter cycle duration = 48 h a) what is the area of your square filtration system? what are the surface dimensions of the filter? b) what volume of water is needed for backwashing plus rinsing the filter in each rinsing cycle?

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.