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A heat pump keeps the air temperature in a house at a temperature of 22.5 oC. The house is losing heat to the outside air through the walls and the windows at a rate of 61,500 kJ/h while the energy generated within the house from people, lights, and appliances amounts to 4,500 kJ/h. For a COP of 2.5, determine the power input to the heat pump in kW.
find the force f required to hold the plug in place at the exit of the water pipe. the flow rate is 1.5 m3s the
Prepare a report on the various types of methods available in Australia to protect intellectual property - The strategy's main items should include what to protect, what countries to protect it in, how to protect it, and when to seek protection
You want to know if you should replace the existing machines, which has a Cpk of 1.0. You decide to determine the Cpk for the new machines and make a decision on that basis.
2kg of air in a closed rigid tank is fitted with an electrical resistor. the resistor draws a constant current of 10
a helical tension spring is made of 1.2 mm wire having a yield strengths of 1280 mpa tension and 740 mpa torsion. the
a person with a mass of 85 kg wearing snow skis is gliding down a long slope at an angle of 15 degrees. each ski is 185
the boat is to be pulled onto shore using two ropes. If the resultant force is to be 1000 N, directed along the keel aa , determine the magnitude of forces T, P acting in each rope at the angle teta of P so that the magnitude of P is minimum. T ac..
an engineer designing a vibration isolation system for an instrument console models the console and isolation system as
the 2.4m wide portion abcd of an inclined cantilevered walk-way is partially supported by members ef and gh. knowing
refrigerant -134a at 800kPa and 25 C is throttled to a temperature of -20C. determine the pressure and the internal energy of the refrigerant at the final state.
a rigid tank of cold fluid sits in a room at 300 k t... the fluid is initially at 180 k t.. the luis temperature is
an 8 ft3 tank contains air at an initial temperature of 80f and intial pressure of 100psi. the tank develops a small
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