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Thermal Physics

Scorching goIITian

Joined:	21 Sep 2007
Post:	299

30 Dec 2007 00:24:35 IST

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589

thermo

None

air Cp/Cv=1.4

pumped in tire

@ P=2atm T=20degc

if tyre suddenly bursts

wat wud b d temperature of d air cumin out if d tire

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abhishek sinha

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Joined: 18 Dec 2007

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30 Dec 2007 18:59:29 IST

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adiabatic expansion .

apply p^( gamma - 1 ) / T ^ ( gamma ) = const

BHUWAN ARORA

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4 Jan 2008 09:44:23 IST

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why adiabatic expansion

Gaurav Keskar

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Joined: 31 Dec 2007

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4 Jan 2008 23:42:17 IST

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Use adiabatic eqns. since the volume is suddenly expanding.
Think about it, the air in the tyre is going from being compressed to suddenly expanded in the instants that follow the tyre burst.
This process is obviously quick, so you have to use adiabatic eqns.

AyuSH jaiN ##

Cool goIITian

Joined: 30 Dec 2007

Posts: 31

5 Jan 2008 14:23:28 IST

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since tyre is burst suddenly therefore process will be adiabatic

therefore applying (T₁^gamma*P₁^gamma-1) = (T₂^gamma*P₂^gamma-1)

manivasagam

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9 Jan 2008 15:27:08 IST

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dear friends
The process is fixed adiabatic because there is no transfer of heat from the tyre to the sorroundings before it burst(less negligble transfer). but we cannot put isothermal process because there should be inrease in temperature due to increase in pressure.

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