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An open system Brayton cycle has a heat input of 500 kW. The pressure ratio of is 15 and the mass flow rate of air through the engine is 1 kg/s. Right before compression the temperature of the air is 273K and the pressure is 70 kPa.
Determine: Using Constant specific heats
a) The net power produced by this cycle
b) The thermal efficiency
What is the equation for average vehicle delay Is it averge queue over arrivals Average queue over average arrivals
Suppose 2.3 g/day of vinyl chloride, with a half-life of 1 day, leaks into a 20,000 m3 pond. Suppose an adult obtains his drinking water from the pond and consumes the water daily for 7 years
A 40 KVA 3300/240V.50Hz .1 phase transformer has 660 turns on the primary . determine 1, the number of turns on the secondary , 2, the maximum value of flux in the core
A 1000 ft long steel pipe carries water from a reservoir with a water elevation at 826 ft. The pipe has a diameter of 12 in. with a wall thickness of .5 in. A gate valve at the downstream end is slowly closed during a half-mintue period
A bolt located 50 mm fm he center of an automobile wheel is tightened by applying the couple shown for 0.10 s. Assuming that the wheel is free to rotate and is initially at rest, determine the resulting angular velocity of the wheel.
Question about Spring, A 37kg object is placed onto a coil spring which has been compressed 43mm. The force used to compress the spring was 35KN.
The solid circular disk of uniform thickness is released from rest on the 60-degree incline. Calculate the angular velocity w of the cylinder and the magnitude v of the velocity of its center C after it has moved 10 ft down the incline.
A soil specimen has a water content of 18% and a wet unit weight of 118.5 lb/cu. ft. The specific gravity of solids is found to be 2.72. Find the:
Determine the minimum length of a crest vertical curve if the grades are +4% and -2%, Design speed is 70 mi/h
The motor A delivers 3000 hp to the shaft at 1500 rev/min, of which 1000 hpis removed by gear B and 2000 hp is removed by gear C. Determine (a) the maximum shear stress in the shaft; and (b) the angle of twist of end D relative to end A.
An asphalt mixture is placed and compacted. Two tests are taken from the compacted mixture and checked for density. Core 1 had a density of 2403 kg/m3 and an air void content of 6.5%. Core 2 had a density of 2419 kg/m3.
The atmosphere is stable with a lapse rate of -0.2C/100m. The surface air temperature is 15C. A parcel of air is released at the ground with a temperature of 25C. Calculate the maximum mixing height in meters.
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