Qualification > Sciences
Maths & Physics Help
astarmathsandphysics:
Thanks. I find thesex questions hard to answer on a mobile phone.
emi:
thanks i solved it now =D
sweetsh:
Youuu welcome :D
hyebyekadal:
OK guys I did some phy papers and I had some doubts (this is paper 3 2008 June , 2nd vairent)
1.One of the laws about the behaviour of gases states that
“For a fixed amount of gas at constant temperature, the pressure is inversely proportional
to the volume”.
In the space below, write an equation that represents this law.
So i wrote P=1/V
but the ms says that NOT correct and the correct ans is pV=constant
2.Explain, in terms of molecules, how thermal expansion takes place in a solid and in a
gas.
P.S. I got the gas part, need hwlp on the solid part.
Sold:
My ans:The molecules gain more kinetic energy and and vibrate more annd faster. Thus the molecules require greater space.
MS:SOLID higher temperature means higher energy/greater speed of
mols/particles/atoms
NOT more vibration NOT vibrate more
astarmathsandphysics:
--- Quote from: hyebyekadal on April 21, 2009, 02:29:24 pm ---OK guys I did some phy papers and I had some doubts (this is paper 3 2008 June , 2nd vairent)
1.One of the laws about the behaviour of gases states that
“For a fixed amount of gas at constant temperature, the pressure is inversely proportional
to the volume”.
In the space below, write an equation that represents this law.
So i wrote P=1/V
but the ms says that NOT correct and the correct ans is pV=constant
2.Explain, in terms of molecules, how thermal expansion takes place in a solid and in a
gas.
P.S. I got the gas part, need hwlp on the solid part.
Sold:
My ans:The molecules gain more kinetic energy and and vibrate more annd faster. Thus the molecules require greater space.
MS:SOLID higher temperature means higher energy/greater speed of
mols/particles/atoms
NOT more vibration NOT vibrate more
--- End quote ---
should be P=k/v which is equivalent to PV=k
2. When a solid is heated the molecules vibrate against each other and push each other apart.
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