00:01
Hi, in this question we are given with a temperature t1 as 80 degree celsius and temperature t2 as 30 degree celsius and we are given with a temperature t1 is equal to t2 which is equal to 20 degree celsius and diameter is given as 0 .02 meter and specific heat is given as 2 .5 kilojoule per kg kelvin.
00:22
Then we are given with a value of specific gravity as 0 .8 and velocity as 0 .5 meter per second.
00:29
So now we have to find the density of the oil.
00:33
So density of the oil is given as it is specific gravity into density of water.
00:38
So this is equal to it is 0 .8 into 1000 which is equal to 800 kg per meter cube.
00:46
Then we have to find the mass flow rate.
00:48
So mass flow rate is given by it is density of oil into area of cross section into c.
00:54
So which is equal to so it is equal to we have so length is also given which is 30 meters and we have so here speed is nothing but or this is so speed is nothing but this is the velocity v.
01:12
So we have it is 800 into pi by 4 into d square which is so 0 .02 whole square into 0 .5.
01:20
So mass flow rate is 0 .126 kg per second.
01:24
Then we have to find the heat transfer...