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A 23 W compact fluorescent lamp (equivalent to a 100 W incandescent lamp) remains lit for 12 hr a day for a one-year period.
a. Determine the energy consumed over this period.
b. Calculate the utility energy charges for this period at a rate of $0.12/kWh.
consider an r-134a compressor on a refrigeration system. if the refrigerant enters as saturated vapor at 200 kpa 0.03
Consider a thermal energy reservoir at 1500 K that can supply heat at a rate of 150,000 kJ h-1. Determine the exergy of this supplied energy, assuming an environmental temperature of 25 oC.
consider steady heat conduction in a plane wall whose left surface node 0 is maintained at 40 degrees c while the right
The long bolt passes through the 4 in. thick plate. If the force in the bolt shank is 50 lb, determine the average normal stress in the shank, the average shear stress along the cylindrical area of the late defined by the section lines a-a, and the a..
a light pressure vessel is made of 2024-t3 aluminum alloy tubing with suitable end closures. this cylinder has a 3.50
a motorcycle moves with a constant speed of v25 ms around a curved track radius r 800m. what is the magnitude and the
the rigid body shown above is made of a solid truncated cone and solid hemisphere joined together at the bases of the
Explain the purpose of maintenance intervals. Describe the objectives of an airline maintenance program. Compare and contrast formal and informal training methods
Steel balls at 150°C with a specific heat of 0.50 kJ/kg.°C are quenched in an oil bath to an average temperature of 70°C at a rate of 15 balls per minute. If the average mass of steel balls is 1.2 kg, what is the rate of heat transfer from the balls ..
suppose that 1 kg of saturated water vapor at 100ordmc is condensed to a saturated liquid at 100ordmc in a
Oil (p = 800 kg/m3 , u (mu) = 3.0 x 10^-3 kg/ms) is to be pumped at a rate of at least 6.3 x 10^-5 m3/s through hydraulically-smooth horizontal pipe with an equivalent length of 300 m. The pressure at the pipe inlet is 198 kPa (abs).
A machine of mass 400 kg operates at 1500 rpm and has an unbalanced which causes a harmonic repeated force pf magnitude 20,000 N. Design an isolation system to limit the transmitted force to 3,500 N and the amplitude of vibration during operation to ..
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