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Heat is added from a 600°C source until the water is at 1MPa, 500°C. Find the heat transfer and the total change in entropy.
This system is now heated at constant pressure until the temperature of the system is 300oC. Calculate the work done by the steam during the process.
The initial pressure is 100 kPa, and the initial temperature is 20oC. The final volume is 81of the initial volume. Determine the work and the heat transfer.
Determine q and w for each individual process. Assume the specific heats are constant and P1=1 bar, T1=15oC and P2=6 bar.
How much does the internal energy of the air in the auditorium increases during the first 20 minutes after the ventilation system fails?
The initial pressure is 2 bar and the initial volume is 4 m3. The heat transfer to the tank is 2000 kJ, and the final volume is 7 m3. Determine the change in internal energy.
The condenser pressure is 10 kpa and both feedwater heaters are open heaters. Calculate the cycle thermanl efficiency and the net work per kg of steam?
A 32.2 lb object is dropped from a 100 feet building. Determine the velocity and the kinetic energy at the 50 feet level and at 35 feet above the ground.
A 4000 lb car traveling at 60 mph decelerates at a constant rate and comes up to a stop over a distance of 200 feet.
A golfer wants to hit a ball a horizontal distance of 130 meters with a maximum height of 20 meters above his tee-off point and land on a spot that is 10 meters above the tee-off point.
Determine the total mechanical energy of the river water per unit mass and the power generation potential of the entire river at the location.
After a time t' it maintains a constant speed so that when t=160s it has traveled 2000 ft. Determine the time t' and draw the v-t graph for the motion (if you cant draw the graph no problem).
The two electrons in a helium atom are separated by about 0.10 nm and the separation between either electron and the nucleus is about 0.050 nm. What is the total electric potential energy of the ato
A converging-diverging nozzle is designed to operate with an exit Mach number of 1.75. The nozzle is supplied from an air reservoir at 6.9 MPa. Assuming one dimensional flow, calculate maximum back
The piston is in the leftmost position contacting the left side of the cylinder. The heat is transmitted to the gas through the left side of the cylinder. Find specific heat C exhibited by the gas i
Is this a power cycle or a refrigeration/heat pump cycle? Find the Work, W, and the heat transfer, Q, in Btu at each process. Then find the sum of the work and heat transfer.
If he sits up and raises his feet just as he crosses the vertical line, so that his center of gravity is 9 feet from point A, what angle with the vertical will the swing make when the swing reaches
The speed limit on a country road is 70 km/hr. The radius of curvature for a bridge on the road is 50 meters. Was the ticket deserved? Show why or why not.
A freezer is 1 m wide and deep, and 2 m high, and must operate at -10 degree C when the ambient air is at 30degree C. What thickness of polysterene is required if the load on the refrigeration unit
Determine (a) the mass flow rate of condensate, in lb/min. (b) the rate of heat transfer, in Btu/min. (c) the rate of entropy production, in Btu/R - min. (d) the rate of exergy destruction, in Btu/m
A single mixed stream exits at 1 bar. cp,i for air and helium is 1.005 and 5.193 kJ/kg.K, respectively. Ignoring kinetic and potential energy effects and heat transfer and external work, determine f
Knowing that the allowable maximum shearing stress in shaft AE is 9000 psi, determine the smallest permissible diameter of shaft AE.
Write a user-defined function that calculates grade point average (GPA) on a scale of 0 to 4, where A=4 B=3 C=2 D=1 E=0 and. For the function name and arguments use av = GPA(g,h).
If the material modulus values are E=220 kN/mm2 and G=90 kN/mm2, estimate the extension in section dimensions due to the load in the axial direction.
If the applied force P=2000lbs determine the maximum horizontal deflection of the bottom of the beam and the maximum normal stress in the beam.