A sphere of density `d`, specific heat `s` and radius `r` is hung by a thermally insulating thread
Channel: Doubtnut
Date: 2020-04-12

A sphere of density `d`, specific heat `s` and radius `r` is hung by a thermally insulating thread in an enclosure which is kept at a lower temperature than the sphere. The temperature of the sphere starts to drop at a rate which depends upon the temperature difference between the sphere and the enclosure. If the temperature difference is `DeltaT` and surrounding temperature is `T_(0)` then rate of fall in temperature will be   [Given that `DeltaT lt lt T_(0)`]