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A step-type escalator as shown is designed to transport 120 persons per minute at a constant speed v=1.5 ft/s. The overall efficiency of the escalator is estimated to be 70%, and a 200% overload is to be allowed. Assuming that the average weight per person is 160lb, determine the required capacity of the motor of the escalator. The escalator is 15ft high and has a 30 degree angle with the horizon.
Discuss the role of each physical, chemical and biological unit operations and processes employed in the wastewater treatment facility. If this treatment facility is required to supply class A recycle water to those industries for non-potable use
It was observed that the truck traveled a distance of 120 ft after the brake was engaged before coming to a complete stop. If instead the driver brings the truck to a velocity of 90 mph and completely engages the brake
Assuming steam to be an ideal gas, calculate its specific volume and density at a pressure of 90 lb/in^2 and a temperature of 650°F.
you measure the average headway and average spacing of passing vehicles as 3.2 seconds and 165 ft, repsectively. calculate the flow, average speed, and density of the traffic stream in this lane.
Determine the deflection of a simple uniformly loaded beam by the Ritz method,using first one term, then two terms, adn finally three terms in a sine series. Why does the coefficient of sin2piex/L vanish?
Wastewater from a paper mill contains ultimate BOD of 200ppm and DO of 3ppm, water is discharged at a rate of 100,000 gallons per day into a river, the river has a flow of 1 million gallons per day with no BOD
If, on 8/1/2019, 3-year municipal bonds with an AA- rating and a coupon rate of 6.50% (payable semiannually) are selling for $100.00, what would be the fair market value of the 300 Whittier bonds (not including the 8/1/2019 coupon payment)
A flowrate of 3.5 ft^3/s is to be maintained in a horizontal aluminum pipe ( E = 5 * 10 ^-6 ft). The inlet and outlet pressures are 65 psi and 30 psi, respectively, and the pipe length is 500ft. Determine the diameter of the pipe.
Describe the use of productivity models for estimating land productivity. Provide details about various attributes that can be used and how the model is developed . Examples can be used to demonstrate model workability.
A computer CPU chip consists of 50 g silicon,20g copper, and 50 g polyvinyl chloride (plastic). It heats from 15?C to 75?C as the computer is turned on. How much did the entropy increase
The story: The Civil Engineering Department would like to have solar panels installed on the roof of Ghausi Hall to supply some of its electricity use - after all there is plenty of space on the roof and plenty of sun in Davis.
Calculate average figures for tonnes/round and powder factors in kg/tonne and Determine the drill metres required to achieve a production rate from grade control blasting.
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