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A computer code is being developed to analyze a tem- perature sensor of 12.5-mm diameter experiencing cross flow of water with a free stream temperature of 80°C and variable velocity. Derive an expression for the con- vection heat transfer coefficient as a function of the sen- sor surface temperature Tsfor the range 20 Ts 80°C and for velocities V in the range 0.005 V 0.20 m/s. Use the Zukauskas correlation for the range 40 ReD 1000 and assume that the Prandtl number of water has a linear temperature dependence.
An Al2O3 whisker is a small single crystal used to reinforce metal-matrix composites. Given a cylindrical shape, calculate the number of Al atoms and the number of O atoms in a whisker with a diameter of 1 micrometer and a length of 25 micrometers. (..
the upper surface of a 50-cm-thick solid plate k237 wmk is being cooled by water with temperature of 20 degrees
a refrigerator cycle has a cop of 3 and removes 100kw of heat from a building which is kept at 23c. the device rejects
Describe the concept of HRD change in an organization using the Sociotechnical systems theory. Rationalize suitable interventions to address emotions of change.
a device with an inlet cross-sectional area of 1 ft2 receives oxygen flowing at m0.2 with pt100 psia and tt1000 ordmr.
A jet plane cruises at a speed of 980 km/hr. air enters the turbojet engines at 0.73 bar, 230 k. the pressure ratio across the compressor is 10 and the turbine inlet temperature is 1650 k.
What is the difference between corrosion and stress corrosion cracking of pipelines? Which of them is more dangerous and why?
A company is trying to decide which machine to purchase based on the following information. If they all have 15 years useful life and MARR is 10%, use incremental rate of return analysis in Excel to decide which one is the best choice. Don't forge..
A compressor receives 0.1 kg/s R-134a at 150 kPa, -10C and delivers it at 1000 kPa, 40C. The power input is measured to be 3 kW. The compressor has heat transfer to air at 100 kPa coming in at 20C and leaving at 30C (i.e. like a heat exchanger). What..
A water filled manometer is attached to the inlet and the test section of a low speed wind tunnel which has the contraction ratio of 3. what would be the pressure difference between the inlet and the test section in terms of inches of water in order ..
an electric heater in the form of a horizontal disk of 57 mm diameter is used to heat the bottom of a tank filled with
assume that one mole of ar has a volume v 2.5 x 10-3 m3 at 300k. use the van der waals equation to calculate pressure
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