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1. Apply the exergy equation to solve Problem 8.18.
Problem 8.18
A refrigerator should remove 1.5 kW from the cold space at -10?C while it rejects heat to the kitchen at 25?C. Find the reversible work.
2. Apply the exergy equation to solve Problem 8.35 with T0 = 20?C.
Problem 8.35
A 20?C room is heated with a 2000-W electric baseboard heater. What is the rate of irreversibility?
The path of motion of a 7-lb particle in the horizontal plane is described in terms of polar coordinates as r= (3t+2) and theta=(0.2t^2-t) , where t is in seconds. Determine the magnitude of the unbalanced force acting on the particle when t=3s.
Provide a reasonable design for a 99.4% efficient ESP treating 30,000 m^3/min of gas. The dust has a resistivity of 7.1 (10)^10 ohm-cm. Specify the total plate area, channel width, number and size of plates
The maximum wind pressure on the traffic sign is 200 kg/m2. The maximum allowable shear stress is 350 kg/cm2. Design the traffic pole (only vertical element) against torsion knowing that angle of twist at the base
Determine the principal stress at point A on the cross section of the arm at section a-a . Specify the orientation of this state of stress and indicate the results on an element at the point.
A 3000-lb car is traveling on a paved road with Cd (coefficient of drag) = 0.35, Af (frontal area of the vehicle) = 21ft^2, and p(air density)=0.002378 slugs/ft^3. Its engine is running at 3000rpm and is producing 250ft-lb of torque.
According to his will: First give one coin to manager. 1/5th of the remaining to the elder son. Now give one coin to the manager and 1/5th of the remaining to second son and so on..... After giving coins to 5th son, divided the remaining coins among ..
Determine how many buses needed to provide service on the following route with the indicated characteristics:
A soil borrow material in its natural state in the ground has a unit weight of 118pcf. Its natural water content is 7%. What is the dry unit weight of this material?
1. draw a plan of a typical strip mine showing all operational features and equipment.2. answer the followinga. why is
Wastewater from a paper mill contains ultimate BOD of 200ppm and DO of 3ppm, water is discharged at a rate of 100,000 gallons per day into a river, the river has a flow of 1 million gallons per day with no BOD
When the flowrate in a certain smooth pipe is 0.14 cubic meters per second, the friction factor is 0.06. What friction factor can be expected for a flowrate of 0.71 cubic meters per second?
Three reservoirs are connected by three pipes with hA = 100 f t, hB = 20 f t, hC = 0 f t, l1 = 1000 f t, l2 = 500 f t, l3 = 400 f t and D1 = D2 = D3 = 1 f t. Determine flow rate into or out of each reservoir if friction in each pipe is 0.02.
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