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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.
Consider a system consisting of liquid water initially at T1 = 318 K, p1 = 3.5 bar undergoing a process to a final state at T2 = 353 K, p2 = 1.5 bar. Use appropriate equation with the data from the table to evaluate change in specific entropy.
A steel rod 30 m long hangs in a mine shaft and holds a 900 N weight at its lower end (see figure). If the diameter of the circular rod is 6 mm, calculate the maximum normal stress σmax in the rod, taking into account the weight of the rod itself. ..
a 2.0 kg of water at 90 deg. c and 1 bar is placed in a vertical cylinder and sealed with a massless piston. the piston
A belt moves upward at velocity V, dragging a film of viscous liquid of thickness h, as in Fig. C4.2. Near the belt, the film moves upward due to no slip.
a frictionless piston-cylinder device contains 2 kg of nitrogen at 100 kpa and 300k. the nitrogen is compressed in a
high - pressure air at 500 kpa and 30degc is to be used to drive a small turbine for a powering high speed drill. the
Peter works a 12 hour day. 6 hours are no incentive and the rate is $20 per hour. He also completes 16 tasks that are incentive based and the rate is $15 per hour. How much does Peter make in his 12 hour shift and what is his combined hourly wage?
an ideal gas of mass 2 kg is contained within a rigid cylinder and undergoes a cycle which consists of three separate
A 150-horsepower motor is to be installed on a 480 volt three-phase line. What is the minimum size NEMA starter that should be used for this installation?
three shopping carts are initially stationary on a slope the friction in the wheels allowing them to stay still. a
The same fluid is to be used in both the model and the prototype, but γ (model) = 9 × γ(prototype). (a) If V= 50 mph, at what velocity should the model tests be run?
What CPHA, CPOL mode should you use?
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