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A refrigerator is operated by a 0.25-hp (1 hp = 746 watts) motor. If the interior is to be maintained at 4.50°C and the room temperature on a hot day is 38°C, what is the maximum heat leak (in watts) that can be tolerated? Assume that the coefficient of performance is 50.% of the maximum theoretical value. What happens if the leak is greater than your calculated maximum value?
a polymer component that needs to maintain a stress level above 10 mpa for proper functioning of an assembly is
a heat pump is to be used to heat a building during the winter. the building is to be maintained at 22.9oc at all
A team of engineering students is designing a catapult to launch a small ball atA so that it lands in the box. If it is known that the initial velocity vector makes a angle with the horizontal, determine the range of launch speeds for which the ba..
Save Your Professor's Life EGE 2013, Prof. J. Kerns Spring 2016. At this point, you have determined the specifications for load factors, bolt strengths, and the strength of the strut. Also, you calculated distribution of the lift as a function of p..
the annual cost of operating a heat pump at year-end prices is r with units of yr. the costs are expected to inflate at
determine the velocity of its center when it reaches the end of the bowling lane.The ball is always in contact with the bowling lane during its motion. the bowling ball may be assumed to be a uniform solid sphere with a mass of 7 kg and diameter o..
calculate the max deflection in a titanium alloy cantilever beam that can support a 100n load at the end of the beam
Specify the spring constant,the damping coefficient, and the unbalance of the exciter.
A square vertical plate measuring 0.25 m on each side is exposed on one side to air at 1 atm and 10 C. If the plate is held at a constant 286 C, what is the convective heat transfer?
A particular motor has the following specifications: no load speed = 5000 rpm, stall torque = 200mN-m, no load current = 0.25 A, rated operating = 2500 rpm, 100mN-m, 5A. Create the speed-torque curve, torque-current curve, power-torque curve, and det..
What should be the maximum capacity of the fan? Assume the air is incompressible and make all other necessary assumptions.
An A/D converter is to be designed for a special instrument that will accommodate type N thermocouples (see Table 8.3a) operating over the range of 0 to 1000?C. A resolution of 0.5?C at 25?C is desired. Determine the number of bits required and th..
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