Please clear my doubt

[sameer]

Hey guys,

Once my teacher was taking class on thermodynamics.. and we came to know about kelvin's experiment.

he said that if the body is cooled upto -273.15 deg. C or 0 kelvin, the pressure exerted by the body will be 0.

I have a doubt.

If p=o,

force/area = 0, mass * g / a = o.

a cannot be infinity.... so there are two cases..

 

either of mass or acceleration due to gravity is 0

 

case i.) g=0

that means temp. has efect on gravity... i.e. if temp. =0 , g=0.

as far as iknow gravity and temp. are independent.

 

case ii.)

m=0

if mass = o, enormous energy will be liberated. And if mass = 0, that means the body no more exists. so how can superconductors exist in 0 deg. kelvin???

and even all tha bodies irrespective of shape and mass should loose all their mass at 0 deg. kelvin which is again practically nt possible...

 

so please hepl me out..

just tell me how the pressure exerted by the body becomes zero.

[swansont]

Hey guys' date='

Once my teacher was taking class on thermodynamics.. and we came to know about kelvin's experiment.

he said that if the body is cooled upto -273.15 deg. C or 0 kelvin, the pressure exerted by the body will be 0.

I have a doubt.

If p=o,

force/area = 0, mass * g / a = o.[/quote']

 

The problem is that the force is not given by mg.

 

At 0 K the atomic motion would stop. No motion => No collisions => no pressure exerted.

[sameer]

thanks buddy ))