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A billet of stainless steel, AISI 316, with a diameter of 150 mm and a length of 500 mm emerges from a heat treatment process at 200°C and is placed in an unstirred oil bath maintained at 20°C.
(a) Determine whether it is advisable to position the billet in the bath with its centerline horizontal or vertical in order to decrease the cooling time.
(b) Estimate the time for the billet to cool to 30°C for the preferred arrangement.
A water pump delivers 3 hp of shaft power when operating. If the pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 8 ft3/s and the changes in velocity and elevation are negligible, d..
A piston-cylinder assembly contains a two-phase liquid-vapor mixture of H2O at 160 lbf/in.2 with a quality of 70%. The mixture is heated and expands at constant pressure until a final temperature of 480oF is reached. Determine the work for the proces..
compressed natural gas is stored in a spherical tank 8 meters in diameter at ambient temperature 25 degc and at a
the heat flux passing through a plane wall of a well-insulated house is q 2.5 btuhr-ft2 when the temperature of the
You arrived on an alien planet and are tasked with finding conversions between Earth units and alien units. You found that 3.914 liters are equal to 1 gorblox. How many liters is 5 gorblox?
The university requires proof of compulsory vaccinations (including 2 shots of the MMR vaccine) for its students but not its faculty. Provide economic justification for this different approach to student and faulty vaccination requirements.
a steel plate which is 1.5 m by 1.5 m and 30 mm thick is lifted by four cables attached to its corners that meet at a
Air enters the evaporator section of an air-conditioner at 100 kPa, 27oC with a volumetric flow rate of 6 m^3/min. R-134a enters the evaporator at 120 kPa with a quality of 0.3 and rate of 2kg/min and it leaves as a saturated vapor at the same pressu..
water flows at a rate of 20 ls through a horz pipe dia .03 m. the pressure drop across the valve in the pipe is
a spring is stretched 200mm by a 15kg block. if the block is displaced 100mm downward from its equalibrium position and
noting that a person standing in a room maintained at 20degc at all times the inner surfaces of the walls floors and
a heat pump is absorbing heat from the cold outdoors at 5oc and supplying heat to a house at 25oc at a rate of 18000
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