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1a) A copper wire 4.4 um in diameter and 318.9 um long has a temperature at...

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Physics

1a) A copper wire 4.4 um in diameter and 318.9 um long has atemperature at one end of 35 °C and 32 °C at the other. Calculatethe rate of heat flow through the wire, in Watts. (For copper kC=400 W/mK)

1)b) The thermal conductivity of air at room temperature is0.028 W/mK and its density is 1.16 Kg/m3. The averageair molecule travels at 525.4 m/s and collides about every 267 pswith another air molecule. How much heat (in J) is needed to raisethe temperature of a cubic meter of air by 10 °C?

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