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A thin walled tube of inner radius R1, outer Radius R2, and initial temperature Ti is cooled by a fluid of temperature Tf at time t=0. The heat transfer coefficient is h. Find the temperature and the cooling rate of the wire as a function of time. Assume constant thermal properties and neglect the radial temperature gradients and end effects.
water is supplied steadily at 150 ft2s to a hydraulic turbine through a 3ft diamter inlet pipe and discharged through a
at a surface cutting speed of 190 mmin the productive tool life was 60 minutes. at a surface cutting speed of 225 mmin
a heat engine is composed of of a monatomic ideal gas which runs in the following cycle at point a the pressure is 2.6
Complete the sketch of the obtuse triangle. It must have an area of 1.75 in.2. Prove the geometry by dimensioning the sketch and showing the area calculation. Show only those dimensions needed for the area calculation. Note: each grid unit = .25 i..
The uniform 6-kg slender rod rests on the top center of the 3kg block. If the coefficients of static friction at the points of contact are ua=.4 and ub=.6, and uc=.3, determine the largest couple moment M which can be applied to the rod without ca..
a room is heated by an iron that is left plugged in. is this a heat or work interaction? take the entire room including
A magnetic pickup is used to detect the shaft speed of a turbocharger. A standard hexagonal nut is used to excite the pickup. If the shaft is turning at 50,000 rpm, how many positive impulses will be counted per second?
If the room temperature is 15C and the temperature of the air exiting the hair dryer is 50C, what is the percent increase in the air velocity as it passes through the dryer.
a thin plate 6 ft long and 3 ft wide is submerged and held stationary in a stream of water t 60 degree f that has a
An engineer insists that a component is fully constrained with 0 DOF because 2 plates are bolted together with 4 screws (assuming one of the 2 plates is considered "grounded"). Is he / she correct? Explain why or why not using concepts discuss..
a heat engine whose thermal efficiency is 40 percent uses a hot reservoir at 700 k and a cold reservoir at 280 k. a
Determine the power generated by the motor M at this instant if it operates with an efficiency of epsilon = 0.8.
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