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1.Determine the length of an interval of time such that the probability of at least one call in the interval is 0.90
2.Using Raoult's Law or Henry's Law, as appropriate, calculate the pressure and mole fractions in the vapor phase for a system containing a liquid that is 0.3% N2 and 99.7% water (by moles) in equilibrium with its vapor at 80°C.
3.Water is used in a heat exchange to cool 5 kg/s of air from 400 C to 200 C. Calculate (a) the minimum mass flux (kg/s) of the water and (b) the quantity of heat transferred (MJ) to the water each second. The water enters at 20 C and leave at 30 C.
A concrete sewer pipe 1m in diameter is laid so it has a drop in elevation of 30cm per 300m of length. If sewage (assume the properties are the same as those of water) flows at a depth of 50cm in the pipe, what will be the discharge?
The rod is fixed against rotation at its left end, but free to rotate in a bearing at its right end. Each disk is 300mm in diameter. Calculate the maximum shear stress in each segment of the rod.
the casting has a mass of 3 mg. suspended in a vertical position and initially at rest it is given an upward speed of v
Which software do we use to calculate force and moment, and draw shear and moment diagram? I really need this software to design my structural project. Please helps me... thank you so much
Two identical complete-mix activated sludge units are connected in series; one-half of the sludge recycle flow rate, QR, is recycled to the primary effluent pipeline which handles a flow rate Q, and the other half is recycled to the effluent line fro..
Water in a pip has a pressure of 22.1 lb/ft2. What is the pressure head?
Using the Gumbel probability function, estimate the probability that a maximum 24 hour depth in any year will exceed 160 mm. What is the probability that the maximum 24 hour depth will exceed 125 mm
what mass in grams of steam at 100degc must be mixed with 387 g of ice at its melting point in a thermally insulated
A structural element subjected to cyclic loading is made of fc' = 3000 psi concrete. Compressive stresses are changing between 2200 psi and 1600 psi. The frequency of loading is 8 Hz.
1.a rectangular concrete channel is 3 m wide and 2 m high. the water 20 deg celsius in the main channel is 1.5 m deep
Using estimates of rainfall, evaporation, and water consumption, the town engineer developed the following model of the water volume in the reservoir as a function of time
The dye appears 14 days later in an observation well 75 ft away from the injection point. Compute the seepage velocity and estimate the hydraulic gradient in the aquifer if the porosity of the soil is 42%.
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