Question #51c44

1 Answer
A08
Jan 26, 2017

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

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