Question

Question #51c44

Answer 1

`4.17xx10^5N`, rounded to two decimal places

Explanation:

We know that

1. Absolute Pressure by definition is is zero-referenced against perfect vacuum.

2. Gauge Pressure is zero-referenced against ambient atmospheric pressure.

Therefore, Absolute Pressure is equal to gauge pressure `+` atmospheric pressure.

In the given problem we have

Absolute pressure and Gauge pressure is `104atm and 103atm` respectively.
As such outside pressure acting on the window of submarine while at a depth of `1000m=104atm`
Inside pressure is maintained at sea level pressure`=1atm`
Net inward pressure acting on the window`=104-1=103atm`

We know that Pressure of `1 atm = 101325 Nm^-2`
Also Pressure`="Force"/"Area"`

`:.`Force acting on the window`="Pressure"xx"Area of window"`
Inserting above values we get
Force acting on the window`=103xx101325xx(0.2xx0.2)`
`=4.17xx10^5N`, rounded to two decimal places