A copper rod of cross-sectional area and length conducts heat at a steady rate of

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Thermodynamics · Thermodynamics

Problem

A copper rod of cross-sectional area

2.0\,\text{cm}^2

and length

40\,\text{cm}

conducts heat at a steady rate of

50\,\text{W}

. Calculate the temperature difference between its ends. (Thermal conductivity of copper

k = 400\,\text{W m}^{-1}\text{K}^{-1}

.) (a)

25\,\text{K}

(b)

500\,\text{K}

(c)

250\,\text{K}

(d)

125\,\text{K}