Air pressure variation with height

  • Thread starter jranjit
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  • #1
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Hi,

I understand the thumb rule that " the pressure exerted by ten metres depth of water is approximately equal to one atmosphere". Is it applicable for pneumatic systems too ?? that with 10 m head difference in air pressure lines there would be 1 bar difference in pressure between the ends

Please advise
 
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Answers and Replies

  • #2
mgb_phys
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10m of water weighs the same as all the air above your head - so 10m of air is unlikely to weigh the same.
If the atmosphere is roughly 10,000m high then 10m head is about 10/10,000 of a bar different - otherwise you would need to decompress when standing up.
 

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