Pressure is determined as force per unit area of the surface. The SI unit of pressure, pascal is as shown below : 1Pa = 1N m-2 If mass of air at sea level is 1034 g cm-2,calculate the pressure in pascal.



Q.13:- Pressure is determined as force per unit area of the surface. The SI unit of pressure, pascal is as shown below :
1Pa = 1N m-2
If mass of air at sea level is 1034 g cm-2,calculate the pressure in pascal.

 

 

Answer:-



Pressure is the force (i.e. weigh) acting per unit area.
P= F/A = 1034g×9.8ms-2/cm2
 = 1034g×9.8ms-2/cm× 1kg/1000g × 100cm/1m × 100cm/1m = 1.01332×105 N
Now,
1Pa = 1N m-2
∴ 1.01332×105 N×m-2 = 1.01332×105  Pa