Determine the energy per mass developed in kj-kg
Air enters a device operating at steady state at 10 bar and 580 K, and leaves at 1 bar and 500 K. The rate of heat transfer to the air is 347 kJ/kg. Neglecting kinetic and potential energy effects, determine the energy per mass developed in kJ/kg.
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An elevator car of mass 845 kg falls from rest 3.50 m, hits a buffer spring, and then travels an additional 0.390 m, as it compresses the spring by a maximum of 0.390 m. What is the force constant of the spring?
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The rate of heat transfer to the air is 347 kJ/kg. Neglecting kinetic and potential energy effects, determine the energy per mass developed in kJ/kg.
MgO reacts with water to form MG(OH)2. If 5g of MgO is combined with 100g water in a coffee cup calorimeter, the temperature of the resulting solution increases from 22.3 to 32.9C.
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A 70.0 kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations: a) when the elevator is accelerating upward with an acceleration of 1.70m/s^2
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