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Find the thermal conductivity (in Wm^-1 K^-1) and thermal diffusivity (m^2s^-1) for a new insulating material for which the following information has been determined:
Test sample: .5 in. by 1 ft square
delta T across sample: 5 degrees F
Heat flow: 24 Btu in a 10 h test at steady-state
Sample density: 0.15g cm^-3
Sample heat capacity: 0.3 kcal kg^-1 K^-1
a 15-mm od copper tube conveys hot hydraulic oil. in order to dissipate the heat and cool the oil someone suggests that
If the chest is completely filled with ice, calculate the time for the ice to completely melt. State your assumptions. The enthalpy of fusion for water is 330 kJ/kg.
consider one kmol of methane at a pressure of 23.2 bar and a temperature of 200 k.a is this methane an ideal gas? show
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a rigid steel bottle v 0.25 m3 contains air at 100 kpa 300 k. the bottle is now charged with air from a line at 260 k
an engineer designing a vibration isolation system for an instrument console models the console and isolation system as
the pressure from water mains located at street level may be insufficient for delivering water to the upper floors of
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