we arestudying compressibility with different states of matter so.....
Explain why AIR is used to inflate tyres...
and
Explain why STEEL is used to make railways..
i need "science like" answers...
PLEASE HELP THANKS!
2007-08-25 01:51:57 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
A tyre needs to have some resilience so that it gives a smoother ride to the vehicle. For example, small bumps are absorbed by flexing of the tyre. Thus, the filling of the tyre needs to be a substance which, whilst retaining the general shape of the tyre, allows for flexing due to uneven surface. Compressed air is an ideal solution for this purpose: it is cheap and has the necessary properties.
On the other hand, a railway needs to offer a firm surface upon which the train wheels will run. If it were uneven or flexible, then it would be easy for the wheels to leave the track. This is, of course, not what is needed. For this reason, steel is chosen. Other properties of steel also make it the ideal material, it is relatively cheap and can be pre-formed into the required shape. It is hard wearing too and easily cut so that sections of rail can be adjusted to fit where necessary, for example at points.
I hope that this is scientific enough for you.
Dave
2007-08-25 02:06:26 · answer #1 · answered by dave.persondy 2 · 0⤊ 1⤋
Tyres need to be compressible to keep grip on the road. Any gas can be used to inflate a tyre but air is cheapest and always available.
Steel is used to make rail road track because it is hard wearing and will support the huge weight of trains.
2007-08-25 02:01:16 · answer #2 · answered by Anonymous · 1⤊ 0⤋
pneumatic (air filled) tyres are less rigid hence more comfortable than solid ones.
The rigid qualities of steel mean the train won't fall off the rails
2007-08-25 04:16:15 · answer #3 · answered by rosie recipe 7 · 0⤊ 0⤋
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2015-06-13 19:40:49 · answer #4 · answered by Ujjal Ghosh 1 · 0⤊ 1⤋