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3. Read Prob 4-62 A. 15% Sovle this problem in infinite series sum; B. 5% Approximate the solution of infinite sum by its first term and use this "1-term approximation" to answer the question. Based on your observation from this homework problem 1-D and 2-D, is this one-term approximation a good strategy to solve application issues? 4-62 A 2-cm-diameter plastic rod has a thermocouple inserted to measure temperature at the center of the rod. The plastic rod ($\rho$ = 1190 kg/m$^3$, $c_p$ = 1465 J/kg\cdot K, and k = 0.19 W/m\cdot K) was initially heated to a uniform temperature of 70°C and allowed to be cooled in ambient air at 25°C. After 1388 s of cooling, the thermocouple measured the temperature at the center of the rod to be 30°C. Determine the convection heat transfer coefficient for this process. Solve this problem using the analytical one-term approximation method. Air, 25°C Plastic rod Thermocouple wires FIGURE P4-62

          3. Read Prob 4-62
A. 15% Sovle this problem in infinite series
sum;
B. 5% Approximate the solution of infinite
sum by its first term and use this "1-term
approximation" to answer the question.
Based on your observation from this
homework problem 1-D and 2-D, is this
one-term approximation a good strategy
to solve application issues?
4-62 A 2-cm-diameter plastic rod has a thermocouple
inserted to measure temperature at the center of the rod. The
plastic rod ($\rho$ = 1190 kg/m$^3$, $c_p$ = 1465 J/kg\cdot K, and k = 0.19
W/m\cdot K) was initially heated to a uniform temperature of 70°C
and allowed to be cooled in ambient air at 25°C. After 1388 s
of cooling, the thermocouple measured the temperature at the
center of the rod to be 30°C. Determine the convection heat
transfer coefficient for this process. Solve this problem using
the analytical one-term approximation method.
Air, 25°C
Plastic rod
Thermocouple
wires
FIGURE P4-62

3. Read Prob 4-62
A. 15% Sovle this problem in infinite series
sum;
B. 5% Approximate the solution of infinite
sum by its first term and use this "1-term
approximation" to answer the question.
Based on your observation from this
homework problem 1-D and 2-D, is this
one-term approximation a good strategy
to solve application issues?
4-62 A 2-cm-diameter plastic rod has a thermocouple
inserted to measure temperature at the center of the rod. The
plastic rod (ρ = 1190 kg/m^3, cp = 1465 J/kg·K, and k = 0.19
W/m·K) was initially heated to a uniform temperature of 70°C
and allowed to be cooled in ambient air at 25°C. After 1388 s
of cooling, the thermocouple measured the temperature at the
center of the rod to be 30°C. Determine the convection heat
transfer coefficient for this process. Solve this problem using
the analytical one-term approximation method.
Air, 25°C
Plastic rod
Thermocouple
wires
FIGURE P4-62

Added by Thomas M.

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