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A metal plate (k = 180 w/(m*k), p = 2800 kg/m^3, cp = 880 J/(kg*k)) with a thickness of 1 cm is being cooled by air at 5 degrees C with a convection heat transfer coefficient of 30 w/(m*k). If the initial temperature of the plate is 300 degrees C, determine the plate temperature after 2 minutes of cooling.
the boat is to be pulled onto shore using two ropes. If the resultant force is to be 1000 N, directed along the keel aa , determine the magnitude of forces T, P acting in each rope at the angle teta of P so that the magnitude of P is minimum. T ac..
a 20 mm diameter steel bar is to be used as a torsion spring. if the torsional stress in the bar is not to exceed 100
Using static equilibrium calculations, calculate how far from the fulcrum the tweezers must be held to avoid damaging the sliver.
the rod assembly is used to support the 250lb cylinder. determine the components of reaction at the ball and socket
consider the flow of air over a vertical flat plate at a low velocity u1 in ambient pressure p1. the plate surface
Air is initially at a temperature of 500 K and a pressure of 100 kPa. A process occurs so that the specific internal energy of the air increases by 200 kJ/kg (i.e. u2 - u1 = 200 kJ/kg). Modeling the air as an Ideal Gas, determine the final temperatur..
a disk has a mass of 4kg and a radius of 90mm it is at rest when it is placed in contact with the belt which moves with
A gas in a piston-cylinder assembly undergoes an expansion process for which the relationship between pressure and volume is given by pV^n = constant. The initial pressure is 4.25 bar, the initial volume is 0.25 m^3 and the final volume is 0.55 m^3 .
a closed cylindrical tank that is 6 ft in diameter and 26 ft long is completely filled with gasoline. the tank with its
the electric heating systems used in many houses consist of a simple duct with electrical resistance wires. air is
a lidar laser radar gun is an alternative to the standard radar gun that uses the doppler effect to catch speeders. a
an experiment was carried out to calculate forces acting in two members of a pin-jointed framework due to different
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