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Estimate the average thermal energy of a...

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 car)

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(i) here, `T=27^(@)C = 27 +273 = 300K`
Average thermal energy , `=3/2 kT = 3/2 xx 1.38 xx 10^(-23) xx 300 = 6.2 xx 10^(-21) J`
(ii) At `T=6000 K`, Average energy = `3/2 kT = 3/2 xx1.38 xx 10^(-23) xx 6000 = 1.24 xx 10^(-19)J`
(iii) At `T= 10` million `K- 10^(7) = 2.1 xx 10^(-16)J`.
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