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There is a process in which ball bearings made of plain carbon steel are rolling from an oven at a uniform temp of 870 degrees Celsius into a water bath where the water is at 37 degrees Celsius to quench them. A rubber conveyer belt then carries them away. For the rubber to work, the balls must be no hotter than 90 degrees Celsius when leaving the water. The convective coefficient is 590 W/m^2-K and the balls are allowed to be up to 1.0 cm in diameter. If the balls stay in the water bath for 27 seconds, calculate the total amount of heat to be removed from the water to maintain its uniform temperature of 37 degrees Celsius if 100,000 balls are to be quenched per hour
If the deflection of the gae fluid height, h, is 2 inches find the 1) velocity of the jet air and 2) the force exerted on the disk by the air.
air is considered as an ideal gas. dont use gas table for gas properties just assume that both cv and cp are constants.
a downward force of 98 n acts on the free end of the illustrated pulley. ma 47 kg what is block as acceleration?
which of the following characteristics that relate the solutes and solvents and their atoms determine the degree to
Water Distribution: Assume that the pipe has a 12” diameter, is plastic with C = 140 and has a total elevation change of 20 ft. How much energy is required per year to pump the water through the pipe to the customer? Assume that your pump is 80% effi..
A solar water heater operating at steady state heats water from 90 0 F to 120 0 F. The panel is 3600 Btu/hr. Determine 1) the mass flow rate of the water in lb/min and 2) the volume of 120 0 F water after 1 hour in gallons.
the length of the mercury column at the ice point and steam point are 5.0 cm and 40.0cm respectively. when the
a mass of 1 kg of air contained in a cylinder at 1.5 mpa 1000 k expands in a reversible isothermal process to a volume
The 25-kg bar has a centre of mass at G.If it is supported by a smooth peg at C,a roller at A and cord AB, determine the reactions at these supports.
A heat pump uses refrigerant-134a to extract heat from the outside air at -10°C to maintain a house at 15°C.The refrigerant enters the condenser at 600kPa and 25°C at a rate of 45L/min and leaves as a saturated liquid at 600 kPa. The compressor consu..
a first class lever in static equilibrium has a 50lb resistance force and a 15lb effort force. the levers effort force is located 4ft from the fulcrum. what is the actual mechanical advantage of the system?
the l1m long vertical copper tube of inner diameter di20mm and wall thickness t2mm contains liquid water at twater0
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