1.

Pressure is determined as force per unit area of the surface. The S.I. unit of pressure, pascal, is 1Pa=1Nm^(-2) If mass of air at sea level is 1034gcm^(-2), calculate the pressure in pascal.

Answer»

Solution :Pressure is the forece (i.e., weight) acting per UNIT area
But weight = MG
`therefore"Pressure"="Weight per unit area"=(1034gxx9.8ms^(-2))/(cm^(2))`
`=(1034gxx9.8ms^(-2))/(cm^(2))XX(1kg)/(1000g)xx(100CM)/(1m)xx(100cm)/(1m)xx(1N)/("KG ms"^(-2))xx(1Pa)/("1 N m"^(-2))`
`=1.01332xx10^(5)Pa`


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