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A completely reversible heat engine uses a solar receiver for a hightemperature reservoir and a lake for a low temperature reservoir. The sun maintains the receiver surface at 290 ° F while the lake remains at 40 °F.
Calculate the work produced and heat rejected by this engine when 1000 Btu are transferred from the solar receiver to the engine
There are no interchanges in the vicinity of this freeway segment. If the peak-hour factor is .90 and all of the drivers are regular users, what is the level of the service of this compound-grade freeway segment?
If the allowable shear stress is 100 MPa, calculate the maximum shear force V that a W460 X 60 structural steel wide flange is capable of resisting. Use the average web shear approach.
The water table is lowered from a depth of 10' to a depth of 20' in a deposit of silt. All the silt is saturated, even after the water table is lowered. The silt's water content is 26%.
Find the magnitude and direction of the force the cable exerts on the pin for the pulleys
If an 18.9 L (5 gallon) bucket of PCE is released (and equally distributed) into a 3.79x10^8 L (100,000,000-gallon) aquifer, will the PCE standard of 5 microgram/L under the Safe Drinking Water Act be exceeded
Sometimes the side of concrete bridges is observed to turn black in colour. What is the reason for this phenomenon? In prestressing work, if more than one wire or strand is included in the same duct, why should all wires/strands be stressed at the sa..
The contractor ran out of gunite mixture and finished the deep corner of a 5-m-wide swimming pool, with a quarter circle pipe of PVC pipe, . compute the horizontal and vertical forces on the curved panel AB.
velocity of water in the nozzle is given by V=2t/(1-.5x/L)^2. L = 4ft. When x=.5L and t=3s what is the local acceleration along the centerline. What is the convective acceleration.
A tank contains 0.05 m^3 of nitrogen gas at -21 C and 10 MPa. Determine the mass of nitrogen, in kg, using: a) the ideal gas model b) data from the compressibility chart Comment on the applicability of using the ideal gas model for nitrogen at thi..
A triangular shaped swale is to retain the runoff from a catchment with a design runoff rate of 0.01 m3/sec. The longitudinal slope of the swale is to be 1.5% with side slopes of 5:1 (H:V).
A 23-lb crate is pushed by a force F, which has the magnitude that varies as shown on the graph. If the crate is originally at rest and it takes 3 seconds after applying the force to hit the bumper
determine the power that must be supplied to the motor at this instant. The motor has an efficiency of 76 %. Neglect the mass of the pulleys and cables.
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