Physics, 04.04.2020 09:12 nothingworksoutforme
A copper sheet (k = 400 W/m·K, rho = 8900 kg/m3 , c = 380 J/kg·K) of thickness 2L = 4 mm has an initial temperature of 118◦C. It is suddenly quenched in liquid water. (a) It is assumed that the convection coefficient is 1200 W/m2 ·K. If the water temperature is 100◦C, find the time required for the sheet to reach a temperature of 104◦C. (b) To find a more accurate solution, we can account for the boiling of water at the sheet’s two surfaces. Newton’s law of cooling is now expressed as q 00 = h(Ts − Tsat) where the saturation temperature of water is Tsat = 100◦C and the variable convection coefficient is h = 200(Ts − Tsat) 2 W/m2 ·K. Using the lumped cap
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Physics, 22.06.2019 07:30, alejandro1102
The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface
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Physics, 22.06.2019 19:30, starswarsfan
In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.
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A copper sheet (k = 400 W/m·K, rho = 8900 kg/m3 , c = 380 J/kg·K) of thickness 2L = 4 mm has an init...
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