A sphere of density 'd' specific heat capacity 'c' and radius 'r' is hung by athermally insulating thread in an enclosure which is kept at lower temperature than the shpere The temperature of the sphere starts to drop at rate which is proportional to .

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) ]

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) ]

A solid copper sphere of density rho specific heat capacity C and radius r is initially at 200K. It is suspended inside a chamber whose walls are at 0 K. The time required (in mu s) for the temperature of the sphere to drop to 100 K is ( sigma is Stefan's constant and all the quantities are in SI units.)

A solid copper sphere of density rho , specific heat c and radius r is at temperature T_1 . It is suspended inside a chamber whose walls are at temperature 0K . What is the time required for the temperature of sphere to drop to T_2 ? Take the emmissivity of the sphere to be equal to e.

A solid copper sphere of density rho , specific heat c and radius r is at temperature T_1 . It is suspended inside a chamber whose walls are at temperature 0K . What is the time required for the temperature of sphere to drop to T_2 ? Take the emmissivity of the sphere to be equal to e.

A solid copper shere of density rho specific heat c and radius r is at temperature T_(1) It is suspended inside a chamber whose walls are at temperature 0 K The time required for the temperature of sphere to drop to T_(2) is (rrhoc)/(xesigma)((1)/(T_(2)^(3))-(1)/(T_(1)^(3))) Find the value of x? Take the emmissivity of teh sphere to be equal to e .

A sphere of radius r, density, rho and specific heat s is heated to temperature theta and then cooled in an enclosure at temperature theta_(0) . How , the rate of fall of temperature is related with r, rho and s?