What is the general equation for $\frac{H}{T}$ through an extended surface? What is the solution of

that equation if the extended surface is very long and the temperature at the end of the

extended surface is essentially equal to the temperature of the surrounding fluid?

What was your role during the experiment? What data types did you take during the

experiment, and how was it taken? Explain briefly.What are thermal lag and thermal gradient? Explain briefly. A rod has a diameter $13$ mm $,$ length of $72$ mm $,$ and thermal conductivity of $16\mathrm{.}26\frac{W}{m}-k.$

Heat transfer coefficient of surrounding fluid $10\frac{w}{m}{k}^2.$ Find the following if the base

plate$/$heater temperature is $100C$ :

a$)$ Temperature distribution in the fin for three conditions $($a$)$ the fin is very long, $($b$)$ the

fin is finite and heat loss by convection from its end and $($ii$)$ the fin's tip is insulated.

b$)$ Find the amount of heat transfer from each fin, fin efficiency, and fin effectiveness for

all three types of fins.Air is flowing through a rectangular duct of $128mmy75mm$ size at a velocity of $3\mathrm{.}5$

$\frac{m}{s}.$

a$)$ Find the mass flow rate of air and the Reynolds number.

b$)$ If air enters in the duct at room temperature and exits at $78C$ temperature, calculate

the base plate heater capacity if fin efficiency is $75\%.$