Engineering, 13.12.2019 22:31 ZenmasterZack
The typical diameter of an alveolus is 0.3 mm. the surface tension of water is about 70 dyne/cm. the dyne is the unit of force in the cgs system: 1 g*cm/s2. what is the pressure within this alveolus assuming no surfactant at mechanical equilibrium? give the answer in mm hg. (hint: use law of laplace for a sphere)
Answers: 3
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Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.
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Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
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Engineering, 04.07.2019 18:10
Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k
Answers: 2
The typical diameter of an alveolus is 0.3 mm. the surface tension of water is about 70 dyne/cm. the...
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