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The 12 in. thick walls of a furnace are maintained at 2300°F on the inside. What is the energy loss from a square 6 in. by 6 in. duct cut in one of the walls? Assume that the sides of the duct are reradiating surfaces and use the uniform irradiation assumption. Take the room outside the furnace to be a black enclosure at 85°F.
a transfer machine has 36 stations. the ideal cycle time 1.50 min. frequency of line stops f 0.2 however this is
a cart is moving at a constant absolute velocity vcart 5 kmh to the right. a high-speed jet of water at an absolute
conventional ceramics have a fracture toughness of about 5 while advanced ceramics may have 20. determine1 how larger
an ideal diesel cycle has a maximum cycle temperature of 2300degf and a cutoff ratio of 1.4. the slate of the air at
an experiment is designed to measure the heat transfer from a gas stream at temperature 400 f to the outer surface of a
The shaft of a rolling machine is driven by means of a motor placed horizontally. The flywheel which also acts as a pulley is of 1.5 m diameter and has belt tension 5.4 kn and 1.8 kn on tight and slack side respectively.
consider axial viscous flow in a long annular pipe driven by a pressure gradient with an inner solid rod of radius ri
What is the heat loss per unit length of pipe? Consider the effect of insulating the pipe with a rigid urethane foam (k = 0.026 W/m · K). Evaluate and plot the heat loss as a function of the thickness 8 of the insulation layer for 0 8 50 mm.
q1 figure shows a scale drawing of the temperature profile through a composite plane wall.i identify the layer with the
When excited harmonically at 5 Hz, the steady-state displacement of the mass is 5 cm. Calculate the amplitude of the harmonic force applied.
a 10 m3 tank contains nitrogen r0.2969 kjkg-k0.2969 kpa-m3kg-k at 30degc and 600 kpa. some nitrogen is allowed to
A counter flow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 5 m2, and the design value of the overall convection coefficient is 38 W/..
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