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Consider a fin of rectangular cross section for heat rejection in an electronic system. The heat dissipation within the fin corresponds to a uniform heat generation of 10^5W/m^3 and assume uniform properties equivalent to plain carbon-steel. Given that the convection heat transfer coefficient is 25W/m^2K, ambient temperature is 20 C, and the base of the fin is at 400 K. Determine the temperature distribution along the fin and the total heat transfer rate from the fin to the surroundings. State any assumptions you make clearly.
suppose that the us military is considering a new lifetime regulation on their helicopter rotor blades. instead of
the minimum fresh air requirement of a residential building is specified to be 0.35 air change per hour ashrae standard
argon gas flows through a rigid nozzle at steady-state-steady flow. the inlet flow velocity is small. the gas exits the
Beryllium has an HCP unit cell for which the ratio of the lattice parameters c/a is 1.568. If the radius of the Be atom is 0.1143 nm, (a) determine the unit cell volume, and (b) calculate the theoretical density of Be.
a 1-ft3 tank that is initially evacuated is connected by a valve to an air supply line flowing air at 70of 120 psi. the
A wooden board AB, which is used as a temporary prop to support a small roof, exerts at point A of the roof a 57-lb force directed along BA. Determine the moment about C of that force.
consider a house in winter. it is heated by the sun at a rate of 2 kw. electrical appliances in the house are drawing
hydrogen gas at 35ordmc and unknown pressure state 1 enters a steady insulated system which has no work interaction
the drag on a 2-m-diameter satellite dish due to an 80-kmhr wind is to be determined through a wind tunnel test using a
a vessel of volume v 6 liters contains water along with its saturated vapor under a pressure of 40 atmospheric and a
nitrogen gas at 60 kpa and 7 degrees celsius enter an adiabatic diffuser steadily with a velocity of 195 ms and leaves
a closed stationary sytem consists of 2 kg of mass. during a certain process 20 kjkg of work is done on the system and
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