Calculate the temperature of helium before the expansion
Helium gas in an ideal Otto cycle is compressed from 12C and 2L to 0.25L, and its temperature increases by an additional 800C during the heat addition process. Calculate the temperature of the helium before the expansion process.
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Determine the exit temperature of the oil, and the entropy generation of the heat exchanger. If instead of making this calculation, you had measured the exit temperature of the oil at 300K
In an Analysis of Variance Summary Table, if the Mean Square Between =43 and the Mean Square Within=23, then the null hypothesis of the groups having the same mean is
One gram of water changes from liquid to solid at a constant pressure of 1.00 atm and a constant temperature of 0°C. In the process, the volume changes from 0.60 cm3 to 1.10 cm3. Find the change in the internal energy of the water.
The turbine is adiabatic, and kinetic and potential energy changes are negligible. If the isentropic turbine efficiency is 75%, determine the work per unit mass flow in KJ/kg, and plot on an h-s diagram.
Leisure time in Gallup poll, 1010 adults were randomly selected and asked if they were satisfied or dissatisfied with the amount of leisure time they had. Of this sample 657 said that they were satisfied and 353 said that they were dissatisfied.
A .5-kg object is attached to a spring of spring constant 30 N/m and released from rest at t=0 from a position .25 m from equilibirum. Find the equation which describes its x location as a function of time.
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.
The refrigerant R-22 is used as the working fluid in a conventional heat pump cycle. Saturated vapor enters the compressor of this unit at 50 F; its exit temperature from the compressor is measured and found to be 185 F.
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