fluid mechanics>pressure>units>pressure at 1 point |by unitech108

 fluid mechanics

unit 2

topic=pressure

VIDEO

link
https://youtu.be/Pz8oPCBg_EM
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Pressure

• In the fluid system pressure intensity due to my molecular present in the system
• Pressure intensity is defined as the P is equal to F divide by A

P=F/A,,
Where ,F= normal force to the area / total force 
A=analysed area 
P=pressure intensity

Unit of pressure 

• SI unit =Newton per metre square 
• CGS unit =dyne per centimetre square 
• 1 ATM=101325 Newton per metre square 
• 1 bar= 10^5 Newton per metre square
• 1 PSI= 694 2.66 Newton per metre square 
• 1 torr=1 mm of HG

 NOTE
 relation between units 
1 ATM=101325 Newton per metre square=1.01325 bar= 14.6 psi=760 mm of HG or 760 torr

order of units

ATM >bar> PSI >torr>Newton per metre square

Pressure intensity at one point

dP=¶gdH 
2017-ssc je
(in hydrostatic fluid =relative motion not present between fluid layer) dP=¶gdH 

1. absolute system 
2. gauge system