Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 7 (Q.No. 4)
4.
Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for
Discussion:
5 comments Page 1 of 1.
Ahmed said:
6 years ago
If its depends on the surface area we choose the cube, but if we speak about the shape we choose the sphere.
Yadav said:
7 years ago
Among options, the cube has larger surface area according to given conditions.
Hence option A is correct.
Hence option A is correct.
Omkar said:
2 years ago
The surface area of the cube would be large that's why it would cool fast. So cube is the right answer.
Abhinav prtap said:
9 years ago
Why not sphere?
According to me, it should be sphere.
According to me, it should be sphere.
(1)
Hameer Singh said:
9 years ago
Because of sphere surface area relative cube minimum.
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