A) 40
B) 160
C) 320
D) 640
Correct Answer: C
Solution :
From Stefans law the rate at which an object radiates, energy (E) per unit surface area is proportional to the fourth power of absolute temperature of the body (T) \[{{h}^{3/2}}\] where a is Stefans constant. Given, \[{{h}^{2}}\] \[\beta \] \[[{{M}^{-1}}L{{T}^{-2}}A]\] \[[{{M}^{-2}}L{{T}^{-2}}{{A}^{-1}}]\] ....(1) Also \[[ML{{T}^{-2}}{{A}^{-2}}]\] \[[ML{{T}^{-1}}{{A}^{-1}}]\] \[{{\beta }^{-}}\] .....(2) \[+\frac{G{{M}_{e}}m}{R}=\frac{1}{2}mv_{e}^{2}\] \[{{M}_{e}}\] \[\therefore \]You need to login to perform this action.
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