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A thermoelectric refrigerator is powered by a 12-V car battery that draws 3 A of current when running. The refrigerator resembles a small ice chest and is claimed to cool nine canned drinks, 0.350-L each, from 25 to 3°C in 12 h. Determine the average COP of this refrigerator.
two solid cylindrical rods are joined at B and loaded as shown rod AB is made of steel(E=200 GPa) and rod BC of brass ( E = 105GPa) determine a) the total deformation of composite rod ABC, b) the deflection of point B
A soil profile consists of 3 m of clean sand (?= 19 kN/m3) over 6 m of marine clay (?= 16 kN/m3, kv = 10-9 m/s) over 3 m of silty clay (?= 17 kN/m3, kv = 2 X10-9 m/s).
Determine the vertical stress of 4m below the centre of shallow foundation 3 x 3m carrying a uniform pressure of 275 kN/m3. Plot the variation of vertical stress with depth (up to 10m) below the centre of the foundation
In a venturi meter the gage pressure is 120 kPa whencavitation just starts to occur. If the Diameter is 40 cm and theneck diameter is 14 cm, what is the water discharge in the system for this condition of incipient cavitation
The difference in water level is 60ft. Determine the size of pipe for a water temperature of 60 degrees Fahrenheit. Apply The Darcy-Weisbach equation.
If the coefficient of sratic friction between the wheels at B and the ground is 0.5 determine if it is possible to pull at p=1200 lb without causing the wheels at B to slip or the front wheels of A to lift off the ground
where u(t) is in vehicles per minute and t is in minutes. When will the queue clear?
The arrival rate at a parking lot is 6 veh/ min. Vehicles start arriving at 6: 00 P. M., and when the queue reaches 36 vehicles, service begins. If company policy is that total vehicle delay should be equal to 500 veh-min, what is the departure ra..
Determine how many years from now the consumption will reach its design capacity with current usage rates if the community has a declining growth rate.
The crane hoists a uniformly distributed load C. the two identical motors at A an power through gearboxes operating at maximum output speed of 100 rpm.the load is lifted by winding cable onto spindles attached to the output shaft of each gear box. Th..
A fixed-bed carbon adsorption system consisting of two 3-foot-deep beds containing 6 x 16 mesh carbon operates at a superficial gas velocity of 60 ft/min. Specify the horsepwoer of the fan motor for 15,000-cfm system
If the barometer reads 102 kPa abs, what is the partial pressure of the dry air, and what is its specific weight. What is the specific weight of the atmosphere (air plus the water vapor present).
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