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Heat in the amount of 80 kJ is transferred directly form a hot reservoir at 985K to a cold reservoir at 280K. Calculate the entropy change of the two reservoirs and determine if the increase of entropy principle is satisfied kJ/K round to four decimal places
three lbm of air at 300 f and 100 psia expands to twice its original volume in an adiabatic process carried out in a
cu and ni form a substitutional solid solution. this means that the crystal structure of a cu-ni alloy consists of ni
Determine an equation for the efficiency of the gear train in terms of the load (torque) on shaft 2 and determine the input power required at shaft 1.
air at a pressure of 400kpa and a temperature of 700 degree celsius expands in a turbine at steady state to a pressure
Tin exists in two solid forms, white and gray tin. While white tin has a bodycentered tetragonal structure, the structure of gray tin is diamond cubic. The enthalpy and entropy changes associated with the transformation of gray tin to white tin at 29..
A 8 m rectangular gate shown below weighing 200 N is held in place by a horizontal flexible cable as shown in the figure below. Water acts against the gate which is hinged (frictionless hinge) at point A. determine the tension in the cable.
how long is required for half the ice cube to melt? State clearly all the assumptions you make in formulating your model of this problem.
a vessel contains 2 litres of gas at a pressure of 300kpa and a temperature of 27 degrees c. 3 litres of gas at the
a gear reduction system consists of three gears a b and c. gear a starts from rest at time t0 and rotates clockwise
A compressor is employed to compress gas flowing steadily through it. The gas enters the compressor at a temperature of 16°C, a pressure of 100 kPa, and with an enthalpy of 391.2 kJ/kg. The gas leaves the compressor at a temperature of 245°C, a pre..
consider an ideal fuel cell to be run on pure oxygen and hydrogen for a length of time. determine the ration of the
the acme company claims to have designed an adiabatic turbine that will produce 105 btu per pound of the steam. the
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