Question

How is the surface area of an average person is 2m^2 in the chapter pressure

Answer 1

The total atmospheric pressure experienced by the person's whole body is, P = 202650 N/m²

Step-by-step explanation:

Given data,

The surface area of the person, A = 2 m²

The standard atmospheric pressure is P = 101325 N/m² (or), Pascal

This is the amount of pressure experienced by 1 m² body at sea level.

If the surface area of the person is, A = 2 m², then the pressure becomes,

P = 2 x 101325 N/m²

= 202650 N/m²

Hence the total atmospheric pressure experienced by the person's whole body is, P = 202650 N/m²

Answer 2

We have to show surface area
`=2m^2`,with few conditions that is by considering Force
`=200000\ N` and Pressure
`=100000\ Pa` to be respectively.

Step-by-step explanation:

The atmospheric pressure is
`=10^(5)\ Pa` on Earth's surface.

The magnitude of the force exerted on a person by the atmosphere is
`=2* 10^(5)\N (or)\ 200kN\ (or)\ 20\ ton`.

Now to calculate surface area we can find it from
`pressure=(force)/(area)` and re-arranging it to.

`area=(force)/(pressure)`

So plugging the values,

Surface area
`=(20000)/(10000)=2\ m^(2)`

Hence from the above calculations we can say that surface area is
`2m^2`.

So the surface area of an average person can be said to have
`2m^2`, using the concept of pressure and force.