Estimate the average thermal energy of a helium atom at (i) room temperature `(27^(@)C)` (ii) the temperature on the surface of the sun (6000K), (iii) the temperature of 10 million kelvin (the typical core temperature in the case of a star)

Explanation

(a) `6.2 xx 10^(- 21) J` (b) `1.24 xx 10^(-19) J` (c) `2.1 xx 10^(-16)J`