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A thin long electric heater of width 20 cm is placed with its width oriented vertically. It dissipates heat by free convection from both sides of its surface into air at 20C. If the heater should not exceed 225C, determine the length of the heater in order to dissipate 1000 W safely
An engine, having 90% efficiency, produces 25 MW power. Calculate the power produced for the same inlet conditions and exit pressure if efficiency of engine is increased to 98% by redesigning it.
a tank contains 1 m3 air at 100 kpa 300 k. a pipe flowing air at 1000 kpa 300 k is connected to the tank and it is
a thin plate 6 ft long and 3 ft wide is submerged and held stationary in a stream of water t 60 degree f that has a
determine the ocean depth at which the water becomes supercritical. assume the density of the water is that of fresh
steam enters the nozzle of a turbine with a low velocity at 3 mpa 350degc and leaves the nozzle at 1.6 mpa at a
during the course of a motor test the motor rpm is measured and recorded at regular intervals as990 1030 950 1050 1000
when air is released adiabatically from a tire the temperature of the air at the nozzle exit is 37 degrees celsius
consider an isentropic expansion process in a piston cylinder device where air is expanded from 1mpa and 800 k to 0.1
a rigid tank has a volume of 60 liters and initially contains a two-phase liquid-vapor mixture of h2o at a pressure of
a conveyor belt rises at a thirty degree angle. its vertical hight measured from the ground is 20 ft sorry i cant seem
determine the time required by a diesel-electric locomotive which produces a constant drawbar pull of 60000 lb to
How the lubricants reduce the friction and wear characteristics of the parts in contact?
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