00:01
Hello students, hope you all doing great.
00:03
In this question we are asked to find out heat transfer rate for the given system.
00:08
First of all we will find out surface area of the hot plate.
00:11
So surface area of the hot plate can be find using the formula 2 pi r l plus pi r square where r is radius and l is the length.
00:22
So we know that radius is equals to diameter divided by 2.
00:27
Diameter is given as 15 centimeter.
00:30
So radius is equals to 7 .5 centimeter and length of the system or length of the pipe is given as 1 meter.
00:41
Using this formula we can find out surface area.
00:45
So surface area is equals to 2 into pi that is 3 .14 into 0 .0075 into 1 plus 3 .14 into 0 .00075 whole square.
01:10
Solving this we have surface area denoted by the alphabet a is equals to 0 .488 meter square.
01:21
Now we will find out overall heat transfer coefficient which is denoted by 1 upon u.
01:28
So overall heat transfer coefficient.
01:41
So here we have 1 upon u is equals to 1 upon h i plus delta upon k plus 1 upon h 0...