The amount of heat this resistor gives in 24 hours and heat fiux q is mathematically given as
Generally, the equation for Qt is mathematically given as
[tex]\begin{aligned}Q_t &=\dot{Q} \times \text { time } \\&=1.2 \times \mathrm{J} \times(24 \times 3600) \mathrm{see} \\Q_d &=103680 \mathrm{~J} \\Q_d &=103.680 \mathrm{~kJ}\end{aligned}[/tex]
(b) heat fiux q=Q/A_s
[tex]\begin{aligned}A_s &=\frac{\pi}{4} d^2 \times 2+\pi d L \\\\A &=\frac{\pi}{4} \times 0.4^2 \times 2+\pi \times 0.4 \times 2 \\\\A &=2.764601 \mathrm{~cm}^2 \\\\A &=2.764601 \times 10^{-4} \mathrm{~m}^2 \\\\q &=\frac{1.2 \times 104^{+}}{2.764601}=4340.589(\mathrm{~W} / \mathrm{m}) \\\\q &=4340.589 \mathrm{~m} / \mathrm{m}{ }^2\end{aligned}[/tex]
In conclusion,
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