msw

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o msw (metres sea water), used in underwater diving, particularly in connection with diving pressure exposure and decompression o kilogram-force, or kilopond, per square centimetre (technical atmosphere ) o gram-force and tonne-force (metric ton-force) per square centimetre o barye (dyne per square centimetre) o kilogram-force and tonne-force per square metre o sthene per square metre (pieze ) Pressure units v t e Pascal Bar Technical atmospher e Standard atmospher e Torr Pounds per square inch (Pa) (bar) (at) (atm) (Torr) (psi) 1 Pa ≡ 1 N /m 2 10 −5 1.0197×10 5 9.8692×10 6 7.5006×1 0 −3 1.450377×1 0 −4 1 bar 10 5 ≡ 100 kPa 10 6 dyn /cm 2 1.0197 0.98692 750.06 14.50377 1 at 0.980665× 10 5 0.980665 ≡ 1 kp /cm 2 0.9678411 735.5592 14.22334 1 atm 1.01325×1 0 5 1.01325 1.0332 1 ≡ 760 14.69595 1 Torr 133.3224 1.333224× 10 −3 1.359551× 10 −3 1.315789× 10 −3 1 / 760 atm ≈ 1 mm Hg 1.933678×1 0 −2 1 psi 6.8948×10 3 6.8948×10 2 7.03069×1 0 −2 6.8046×10 2 51.71493 ≡ 1 lb F /in 2 Examples

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PRESSURE

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msw (metres sea water), used in underwater diving, particularly in connection with diving pressure exposure and decompression kilogram-force, or kilopond, per square centimetre (technical atmosphere)

gram-force and tonne-force (metric ton-force) per square centimetre

barye (dyne per square centimetre)

kilogram-force and tonne-force per square metre

sthene per square metre (pieze)

Pressure units

v t ePascalBarTechnical atmosphereStandard atmosphereTorrPounds per square inch

(Pa)(bar)(at)(atm)(Torr)(psi)

1 Pa 1 N/m21051.01971059.86921067.50061031.450377104

1 bar105 100 kPa

106dyn/cm21.01970.98692750.0614.50377

1 at0.9806651050.980665 1 kp/cm20.9678411735.559214.22334

1 atm1.013251051.013251.03321 76014.69595

1 Torr133.32241.3332241031.3595511031.315789103 1/760 atm

1mmHg1.933678102

1 psi6.89481036.89481027.030691026.804610251.71493 1 lbF /in2

Examples

As an example of varying pressures, a finger can be pressed against a wall without making any lasting impression; however, the same finger pushing a thumbtack can easily damage the wall. Although the force applied to the surface is the s