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Maths & Physics Help

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SGVaibhav:
i wanted notes for states of matter

astarmathsandphysics:
There are some more gcse-igcse activbooks up now on www.freeetextbooks.com

hyebyekadal:
um...astar i dint get what u mean about the expansion... so how come the ms disapproves it??
thanx again for answering anyway!

astarmathsandphysics:
The molecules in the solid vibrate more so push each other further apart on average.

nid404:
The second part of the question needs help.
Q.The air in a bicycle tyre has a volume of 1000cm3 and a pressure of 2.5 atmospheres. If the air is released ( at the same temperature) so its pressure is 1 atmosphere, what is the volume of the air?

This part needs help

A bicycle has a volume of 100cm3 and is now used to pump up the tyre. After 1 stroke of the pump, what is the presure in the tyre?

Thanks

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