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A rapid sand filter has a loading rate of 8.00 m/h, surface dimension of 10m x 8m, an effective filtration rate of 7.70 m/h, and a production efficiency of 96 percent. A complete filter cycle duration in 52h and the filter rinses for 20 minutes at the start of each cycle.
(a) What flow rate (m^3/s) does the filter handle during production?
(b) What volume of water is needed for backwashing plus rinsing the filter in each filter cycle?
a spherical balloon is being inflated so that its volume is increasing at the rate of 5 cu meter/min. at what rate is the diameter increasing when the diameter is 12m?
Compute the maximum acceptable service load on an A36 steel plate tension member 1/4in.x12in. having a single line of holes parallel to the direction of loading. The load is 25% dead load and 75% live load, and 7/8in. diameter bolts are used.
Water flows at 8 m^3/s through a rectangular channel 4 m wide and 3 m deep. If the velocity is 1 m/s, calculate the flow depth in the channel. If this channel expands downstream to a width of 5m and the depth decreases by 0.5m from the upstream de..
A 600 MWe power plant has an efficiency of 36% with 15% of the waste heat being released to the atmosphere as stack heat and the other 85% taken away in the cooling water.
Bars AB and CD are made of A-36 steel and 2014-T6 aluminum alloy,respectively. When the temperature is at 75degreeF, ACE is in the horizontal position.
Two identical pool balls of 57.15 mm diameter may move freely on a pool table. Ball B is at rest and ball A has an initial velocity v=v0i. (a) knowing that b=50 mm and e=0.7, determine the velocity of each ball after impact.
Determine the mass flowrate through boiler needed to produce 5000KW of power.
On your first trip to Planet X you happen to take along a 165 g mass, a 40 cm long spring, a meter stick, and a stopwatch. You're curious about the free-fall acceleration on Planet X, where ordinary tasks seem easier than on earth
Find the depth and the top width of a v-notch capable of discharging a maximum of .7m^3/s and such that the head shall be 75mm for a discharge of 5.6 liters per second.
A barge measures 10 ft (depth) by 35 ft by 120 ft and weighs 100 U.S. tons. The barge floats in fresh water (specific weight = 62.4 lb/ft3) and is evenly filled with 38,000 bushels of corn (60 lb/bushel).
A gas is compressed at a constant pressure of 0.800 atm from 9.00L tp 2.00L. in the process, 400J of energy leave the gas by heat. (a) What is the work done on the gas? (b) What is the change in it internal energy?
A circular concrete pipe (n = 0.012) carries a discharge of 450 cfs with a slope of 0.008 and is designed to run no more than 60% full (by depth). What diameter pipe would you recommend
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