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1. An air compressor receives air at 290 K, 100 kPa and brings it up to a higher pressure in an adiabatic process. The actual specific work is 210 kJ/kg, and the isentropic efficiency is 82%. Find the exit pressure and the second-law efficiency.
2. A flow of 2 kg/s water at 1000 kPa, 80?C goes into a constant-pressure boiler, where the water is heated to 400?C. Assume the hot gas that heats the water is air coming in at 1200 K and leaving at 900 K, as in a counter flowing heat exchanger. Find the total rate of irreversibility in the process and the second-law efficiency of the boiler setup.
determine the deflection of a simple uniformly loaded beam by the ritz methodusing first one term then two terms adn
Assume you are an observer standing at a point on the track for a period of 30 minutes and are recording the instantaneous speed of each vehicle as it crosses your point. What is the time-mean speed and space-mean speed for these vehicle
The 90lb door has its center of gravity at G. A)Determine the components of reaction at hinge A if hinge B resists only forces in the x and y directions and A resists forces in the x,y,z directions.
Assume that the solar energy is incident on the pond at a rate of 500 W per m2 of pond area at noontime, and that the pond is capable of storing 15 percent of the incident solar energy in the storage zone.
estimate the velocity with which you would contact the ground if you jumped from an airplane at an altitude of 500ft and a) air resistance is negligible, b) air resistance is important, but you forgot your parachute
Replace the distributed loading by an equivalent loading force and specify its location measured from point A.
At a depth of 4 miles in the ocean the pressure is 9520 psi. Assume that the specific weight at the surface is 64.00 lb/ft^3 and that the average volume modulus is 320,000 psi for that pressure range.
If a force of magnitude P is applied to the grip of the clamp, determine the compressive force F that the wood block exerts on the clamp.
a 10 mm diameter jet of water is deflected by a homogeneous rectangular block (15 mm by 20 mm by 100 mm) that weighs 6 N. Determine the minimum volume flow rate needed to tip the block over
A scientist plans to build a water barometer. When the atmospheric pressure is 990 mb abs and the water temperature is 70 degrees Celsius, what would you expect the barometer reading (water rise) to be?
The W14 × 53 structural A992 steel column is fixed at its base and free at its top. If P = 75 kip, determine the sidesway deflection at its top and the maximum stress in the column.
A moist soil sample weighing 22.2 N has a moisture content of 20%. How man N of water must be added to the sample to increase the moisture content to 30%
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