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A 1 kg steel pot contains 1 kg liquid water both at 15oC. It is now put on the stove where it is heated to the boiling point of the water.
A 1-m3 rigid tank contains 100 kg R-22 at ambient temperature, 15?C. A valve on top of the tank is opened, and saturated vapor is throttled to ambient pressure
A 1-m3 insulated, 40-kg rigid steel tank contains air at 500 kPa, and both tank and air are at 20°C. The tank is connected to a line flowing air at 2 MPa, 20°C.
A 1-L capsule of water at 700 kPa, 150°C is placed in a larger insulated and otherwise evacuated vessel.
A 1-g sample of a certain fuel is burned in a bomb calorimeter that contains 2 kg of water in the presence of 100 g of air in the reaction chamber
A 1-ft3 tank that is initially evacuated is connected by a valve to an air supply line flowing air at 70 F, 120 lbf/in 2.
Working in groups of two, our students design and perform experiments on forced convection phenomena using the general arrangement shown schematically.
The surgeon may wish to control the heat rate q and the outlet temperature Tc,o of the blood by altering the flow rate and/or inlet temperature
A 0.04-m3 tank initially contains air at ambient conditions of 100 kPa and 22°C. Now, a 15-liter tank containing liquid water at 85°C is placed into the tank
You have been asked to determine the feasibility of using an impinging jet in a soldering operation for electronic assemblies
60-kg man used to have an apple every day after dinner without losing or gaining any weight. He now eats a 200-ml serving of ice cream instead of an apple
4L jug of milk at 25°C is placed in your refrigerator where it is cooled down to 5°C. The high temperature in the Carnot refrigeration cycle is 45°C
3 kg of liquid water initially at 12°C is to be heated at 95°C in a teapot equipped with a 1200-W electric heating element inside
10 kg of water in a piston cylinder arrangement exists as saturated liquid/vapor at 100 kPa, with a quality of 50%. It is now heated so the volume triples.
A 0.12-m3 rigid tank contains saturated refrigerant- 134a at 800 kPa. Initially, 25 percent of the volume is occupied by liquid and the rest by vapor.
A 0.08-m3 well-insulated rigid tank contains oxygen at 220 K and 10 MPa. A paddle wheel placed in the tank is turned on, and the temperature of the oxygen
A 0.5-m diameter balloon containing air at 200 kPa, 300 K, is attached by a valve to an air line flowing air at 400 kPa, 400 K.
A 0.3-m3 rigid vessel initially contains saturated liquid- vapor mixture of water at 150°C. The water is now heated until it reaches the critical state
A 0.3-m3 rigid tank contains 0.6 kg of N2 and 0.4 kg of O2 at 300 K. Determine the partial pressure of each gas and the total pressure of the mixture.
A 0.2-m-thick plane wall is constructed of concrete. At steady state, the energy transfer rate by conduction through a 1-m2 area of the wall is 0.15kW
A 0.2 m3 insulated, rigid vessel is divided into two equal parts A and B by an insulated partition
Water at a velocity of 2.5 m/s flows parallel to a 1-m-long horizontal, smooth and thin flat plate.
Water at a temperature of 77°C is to be evaporated slowly in a vessel. The water is in a low pressure container which is surrounded by steam.
Water flowing at 2 kg/s through a 40-mm-diameter tube is to be heated from 25 to 75°C by maintaining the tube surface temperature at 100°C.
How to choose the circuit current direction ? what is the conditon of generator working regime and consumer working regime of an electrical source.