Skip to main content

Fyneman exercise I ch39-2

Q.

A bicycle pump is being used to inflate a tire to a pressure of gauge pressure, starting with air at atmospheric pressure, at . If for air, at what temperature centigrade is the air as it leaves the pump? Neglect heat loses to the walls of the pump.

A.



Note : Gauge pressure



Using eq.(1)





label:

Comments

Post a Comment

Popular posts from this blog

Solenoidal & Irrotational Vector

Solenoidal If the is zero, is solenoidal , then is the curl of some vector filed . Theorem If there is a such that Irrotational If the is zero, is irrotational , then is the gradient of some scalar field . Theorem If there is a such that
Post a Comment
Read more

Electromagnetism

Field A “field” is any physical quantity which takes on different values at different points in space. Flux Circulation The laws of electromagnetism Moving charge with velocity , For any surface S (not closed) whose edge is the curve C, For any surface S bounded by the curve C,
Post a Comment
Read more

Fyneman exercise I ch39-4

Q. A) Imagine a tall vertical column of gaseous or liquid fluid whose density varies with height. Show that the pressure as a function of height follows the differential equation . B) Solve this differential equation for the case of a gaseous atmosphere of molecular weight , in which the temperature is constant as a function of . A. A) Imagine the volume of unit area and infinitesimal height . Number of molecules = At equilibrium the force of gravity in the volume plus pressure difference is zero. , where is mass of one molecule. For unit mass B) For ideal gas , where is number of molecules in volume . Then, for unit volume , where is number of molecules in unit volume, which means density. From eq.(1) We need . Substituting to eq.(2) gives , where . Reference molecule weight Avogadro constant
Post a Comment
Read more