bar=barometer
At standard conditions ,the height of the HG COLUMN ABOVE THE surface
of the HG INthe disha will be 760mm or 29.9in,The density of mercury is 0.49lbs.per cubic inch and, if the column is 29.9 in.high,it would then exert a force per unit area of 0.49x29.9=14.7pounds/inxin
1 millibar=100pa=0.75torr=9.87x10E-6atm
【 在 waveriver (helloironman) 的大作中提到: 】
: 请各位指点,或者告诉我相关的网站。谢谢了
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