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What is the difference between recirculating and noncirculating hot water systems, and where would the circulating system most likely be used?
a well insulated rigid tank with a volume of 0.4m3 and pressure 150kpa is subject to an internal resistance heater of
fixed costfc 2000000 variable costvc 120.005q total costtc fc vc x q unit sales price p250nbspa determine the values
Calculate the maximum tensile and compressive stresses σt and σc, respectively, at the base of the tree due to its weight.
Consider an ideal Rankine cycle with a single open feed water heater. The boiler pressure is 800 psia, and the condenser pressure is 2 psia. Steam is extracted from the turbine to heat the feed water at 90 psia. Steam enters the turbine at 1000F.
Daily sales records for a computer manufacturing firm show that it will sell 0,1, or 2 mainframe computer systems with probabilities as listed. Find the probability mass function for X, the number of sales in a two-day period, assuming that sales are..
Helium is to be compressed from 120 kpa and 340 K to 700 kPa and 460 K. A heat loss of 20 kJ/kg occurs during the compression process. Neglecting kinetic energy changes, determine the power input required for a mass flow rate of 89 kg/min.
Write a differential equation that could be used to determine pA(x, t) in the water. What does each term in the equation represent physically - Write appropriate boundary conditions that could be used to obtain a particular solution, assuming a "de..
a rectangular room has dimensionslength 3.5m width 4.5m height 3.25ma mercury barometer in the room shows a pressure
The owners of a house on a private lake are thinking of using "pumped storage" as a means of reducing their electricity bills. They will pump water from the lake up to a large reservoir overnight, and then during times of peak power prices, release t..
What information has to be obtained in order to ensure that the method will be a satisfactory one and determine changes in composition of a fluid. Define what is meant by refractive index, and give the relationship between the incident and refracte..
The weight of the air has a negligible effect on the manometer reading.
a piston cylinder device contains 0.25 kg of air initially at 1.8 mpa and 360 degc. the air is first expanded
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