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An isolated system consists of a closed copper vessel of mass 0.1 kg, containing 1 kg of liquid water, each initially at 5°C, immersed in 20 kg of liquid water, initially at 20°C. The system is allowed to come to equilibrium. Determine the final temperature in °C, the entropy change for the copper vessel and each of the liquid water masses, and the amount of entropy produced.
a pump is located 4.5 m to one side of and 3.5 m above a reservoir. the pump is designed for a flow rate of 6 ls. for
a tunnel 150 m long 7.2 m high and 5.8 m wide with a flat roof is to be constructed 60 m beneath the ground. the
a pressurized water tank is used as a source of water for a fire hose. the pressure of the air in the top of the tank
what kind of metals are often recommended for use at low temperatures particularly when any sudden loading of the part
a gas turbine for an automobile is designed with a regenerator. air enters the compressor of this engine at 100 kpa and
a distillation column with a total condenser and a partial reboiler is separating two feeds. the first feed is a
Determine the COP of the heat pump that applies energy to a house at a rate of 4500kj/h for each kW of electric power it draws. Also, determine the rate of the energy absorption from the outdoor air.
nitrogen at 80 kpa and 400 k enters an adiabatic diffuser steadily at a flow rate of 6000 kgh at 230 ms and leaves at
a catalog lists the basic dynamic load rating for a ball bearing to be 7050 lb for a rated life of 1 million
determine the maximum theoretical speed that may be achieved over a distance of 360ft by a car of weight w starting
a 1-in diameter pure copper sphere is suspended in a room where the walls and air are all at 300k. the natural
a flat platform rotates in a horizontal plane about a fixed vertical axis that passes through o. a small disk of 0.5 kg
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