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Determine the illuminances (sun, sky, and ground-reflected) on a vertical, south-facing window at solar noon at 36°N latitude on June 21 and December 21 for
(a) a clear day and
(b) an overcast day.
A high-pressure oxygen cylinder, typically found in most welding shops, accidentally is knocked over and the valve on top of the cylinder breaks off. This creates a hole with a radius of 14 mm. Prior to the accident, the internal pressure of the oxyg..
A heat engine operates between reservoirs at 1000 and 300 K. Some of the power output from the heat engine drives a refrigerator which operates between 250 and 300 K. The heat-transfer input at 1000 K to the heat engine is 1000 kJ, and the heat trans..
Dry air is contained in a tank wit fixed volume at 200oC and a pressure of 5 bar. Then the fluid is heated so that its temperature reaches up to 300oC. If the volume of the tank is 0.2 m3, find the transferred heat and final pressure and the change i..
the ocean thermal energy conversion otec power plant takes advantage of the temperature difference between ocean
A steam power plant uses an ideal Rankine cycle. Superheated vapor enters the turbine at 8 MPa, 480C. The condenser pressure is 8 kPa. The net power output of the power plant is 100 MW.
If the beam has square cross section of 9 in., on each side, determine the absolute maximum bending stress in the beam.
Determine the required weight and angular position of the balancing mass, which is to be located at r4 = 10 in. Show answers on a scale drawing of the rotor.
Comment on the importance of quickly returning the milk carton to the refrigerator from an energy con- servation point of view.
Draw and label the free body diagram for the beam. Calculate the support reaction forces at A and B. Draw the shear force and bending moment diagrams.
a gas turbine operates with a regenerator and two stages of reheating and intercooling. this system is designed so that
A tank with a fixed volume contains 1 kg of dry air at 200oC . If 200 kJ of heat is added to the tank determine the final temperature and change in entropy.
A 680 liter oxygen tank is filled to the pressure of 13.7 Mpa, and used to help a respiratory patient in a room with a temperature of 20 degrees C. During one treatment, 135 Liters of oxygen is supplied from the tank to the patient. The tank is then ..
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