Solar radiation emitted by the sun resembles that emitted by a black body at a temperature of $6000\, K$. Maximum intensity is emitted at a wavelength of about $4800\,\mathop A\limits^o $. If the sun was cooled down from $6000\, K$ to $3000\, K$, then the peak intensity would occur at a wavelength of ……… $\mathop A\limits^o $

A black body, at a temperature of $227\,^oC$ radiates heat at a rate of $7\, cal\, cm^{-2} \,s^{-1}$. At a temperature of $727\,^oC$, the rate of heat radiated in the same $units$ will  be ….. $unit$

The two ends of a rod of length $L$ and a uniform cross-sectional area $A$ are kept at two temperatures $T _{1}$ and $T _{2}\left( T _{1} > T _{2}\right) .$ The rate of heat transfer, $\frac{ dQ }{ dt }$ through the rod in a steady state is given by

Solar radiation emitted by the sun resembles that emitted by a black body at a temperature of $6000\,K$. Maximum intensity is emitted at wavelength of about $4800{\text{ }}\mathop {\text{A}}\limits^o $. If the sun was cooled down from $6000\,K$ to $3000\,K$, then the peak intensity would occur at a wavelength of …….. $\overset{o}{\mathop{A}}$

A hot liquid kept in a beaker cools from $80\,^oC$ to $70\,^oC$ in $2\, min$. If the  surrounding temperature is $30\,^oC$, then the time of cooling of the same liquid from  $60\,^oC$ to $50\,^oC$ …….. $\sec$