Thermal physics - internal energy

13

Ð”Ð²Ò¥Ñ—ÑuÏ now in medical c ·2009-04-04 08:25:02

filled with air...i think

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39

Dr.House ·2009-04-04 08:26:44

yes.

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Ð”Ð²Ò¥Ñ—ÑuÏ now in medical c ·2009-04-04 08:29:30

temperature?

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skygirl ·2009-04-04 08:33:42

we can never find internal energy... we can only find the CHANGE in internal energy!

wat is the change that is taking place here ?

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13

Ð”Ð²Ò¥Ñ—ÑuÏ now in medical c ·2009-04-04 08:38:37

U=f/2[nKT]

'f' is degrees of freedom of air

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1

skygirl ·2009-04-04 08:40:59

waise, assuming the whole internal energy of the gas is due to kinetic energy of the molecules...

so, we have, KE= U = 3/2 PV = 3/2X10⁵(Pa)X60(m³) J

is this the ans ?

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39

Dr.House ·2009-04-04 08:42:05

i dont know the answer, it came in test today. i had no clue.......... thats why asked.

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skygirl ·2009-04-04 09:00:10

k..

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11

virang1 Jhaveri ·2009-04-04 09:18:52

Yes sky i agree with your answer

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