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Consider a hot automotive engine, which can be approximated as a 0.5-m-high, 0.40-m-wide, and 0.8-m-long rectangular block. The bottom surface of the block is at a temperature of 80°C and has an emissivity of 0.95. The ambient air is at 20°C, and the road surface is at 25°C. Determine the rate of heat transfer from the bottom surface of the engine block by convection and radiation as the car travels at a velocity of 80 km/h. Assume the flow to be turbulent over the entire surface because of the constant agitation of the engine block
what is the change of internal energy and enthalpy of 4 kg nitrogen as it changes from 50oc and 100kpa to 100oc and
a velocity field is given by v 2xyi x2j. find the accelaration dvdt and use the euler equation to find the pressure
a 5.0 kg steel block is resting on a horizontal table. the coefficient of static friction us is 0.75 and the uk is
two barges each with a displacement mass of 550 mg are loosely moored in calm water. a stunt driver starts his 1650-kg
the gate in the is hinged at H.the gate is 2 m wide and normal to the palne of the diagram.calculate the force required to hold the gate closed.
suppose that the mass in a mass-spring-dashpot system with m10 c9 and k2 is set in motion with x00 and x05 a find the
a three-point bending test is performed on a spinel mgal2o4 specimen having a rectangular cross section of height d 3.8
a two-cylinder 250 cm3 displacement motorcycle engine that operates on an ideal otto cycle at 4500 rpm. the compression
steam flows through a small turbine at a rate of 10000 kgh entering at 600 degc and 2.0 mpa and emerging at 0.01 mpa
Determine the temperature of the electric heater element and drawing of the temperature profile.
Find the stoichiometric A/F ratio (by mass) for the combustion of benzene (C6H6). Compute the actual A/F ratio and do a wet and dry analysis of the products by volume at a mixture strength of 95%.
what do you understand by closed packed planes and closed packed direction in the arrangement of atoms? justify their
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