Question

A solid sphere, solid cylinder and circular disc of same material and mass are maintained at same temperature. The body which is cooling at fastest rate is (1) solid sphere (2) solid cylinder (3) circular disc

Answer 1

Explanation:

disc as less heat would be there as less atoms compared to others n it will be cool first so easily will be chilles firstly as compared to other

Answer 2

Answer:

(3) circular disk

Explanation:

Surface area to volume ratio greatly affects heat loss in bodies. The larger the surface area to volume ratio the faster the heat loss.

A solid sphere has the smallest surface area for a given volume, therefore it has the smallest S/V ratio.

For a cylinder, the smaller the height the larger the surface area, assuming that the volume is kept constant.

Now, a disk is a cylinder with a very small height, therefore it has the largest surface area among the three shapes and hence the largest S/V ratio.

Therefore, the disk loses heat faster than the other two shapes