Hi Friends,Could you please tell me how the concept of low temperature and pressure evolved &their types?

Question

Such as Origin of low temperature and pressure,different kinds,properties,physics in different fields,applications,Recent trends in that field,Developement in India And in abroad.

Answer 1

Low temperature is cryogenic, try and get a book on it start with introductory book, in your college library.

U. of Maryland's professor has a book written that shows advance calculations on the subject.

Varian Technology(spelling?) and few other companies specialises in low pressure equipment look them on Internet, it may be under very high or ultra high vacuum.

If you need to talk to some one call fibertek in Hernden , Verginia, USA ask for Dr. verdune(spelling?) or look up my profiles, I am listed in white pages on Internet ckick on minootoo.

My master thesis has one use of low temperature, it is in the library at U. massachussetts, Amhest, MA.

Freezing and revieving insects for marking and idedtifying for tracking.

Answer 2

Low temperature and pressure were discovered by the first person who climbed a high mountain.

DeForest and Fleming made good use of low pressure in the thermionic valve. It is hoped that radios might use this technology one day.

Another low pressure application involves a powerful fan pulling in air. This air is passed through a pipe and through a semi-permeable membrane that lets air through but not dust. The dust is collected and then can be disposed of. Houses can be cleaned with this device.

A low temperature application that might see application in India soon is a special insulated cabinet with a heat extraction system. This cabinet can be used to keep food and drink cold.

Answer 3

Boyle was the first to investigate relationship of pressure and volume.
p1v1=p2v2
Charles a 100 years later established the relationship between temp. and volume.
v1/t1=v2/t2.
gay lussac gev the law of combiniig volumes followed by amedeo avogadro gas law.
the gas eq. so formed was:
pv=nrt
p=pressure, v=volume , n=no. of moles of the gas , r=universal gas constant , t= temperature