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The lighting needs of a storage room are being met by 6 fluorescent light fixtures, each fixture containing four lamps rated at 60 W each. All the lamps are on during operating hours of the facility, which are 6 AM to 6 PM 365 days a year. The storage room is actually used for an average of 3 h a day. If the price of electricity is $0.08/kWh, determine the amount of energy and money that will be saved as a result of installing motion sensors. Also, determine the simple payback period if the purchase price of the sensor is $32 and it takes 1 hour to install it at a cost of $40.
A person with glasses enters a heated room at 22oC, after spending some time in the cold (the glasses are at 1oC). The glasses start to fog. Find the minimum value of the relative humidity in the room.
a fully automated production line in a facility involves metal blocks being placed in a furnace for heat treatment. two
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..
A 1/10th scale model of an airplane is to be tested in a wind tunnel that operates with air at a pressure of 20 atmospheres. The plane is expected to fly at a speed of 500 [km/hr]. What speed should the wind tunnel be run?
A model of an airplane is to be tested at 20°C in a wind tunnel. The model is built to 1/12th scale. In order to match both the Mach number and the Reynolds number of the plane, the wind tunnel is pressurized. To what pressure (in atm) should the air..
water is flowing through a large circular conduit with a velocity profile given by the equation v91-r216 ft per second.
for antoine equation in the formlog10vp a- btcwith vp in mm hg and t degree c the constants for n-pentane are a6.853
An open cylindrical tank that is 2 ft in diameter and 4 ft high is full of water. If the tank has a 2 in diameter hole in the bottom, how long will it take for half of the water to drain out, if friction is neglected?
an insulated piston-cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kpa and 27 oc. an electric
I need to be able to derive the velocity profile from the navier-stocks equations. Basically from scratch. Problem 4.36 in the fluid mechanics seventh edition Frank M. White In need to get derived down to the Differential form and find the constant o..
during this process heat is exchanged with surrounding such that the entire air remains at 30 degree celsius at all times.determine the heat transfer for this process.
air is compressed in a steady-flow compressor via a polytropic process from 15 psia and 60ordmf state 1 to 75 psia and
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