A research submarine has a 20-cm-diameter window that is 9.0 cm thick. The manufacturer says the window can withstand forces up to 1.2×106 N . What is the submarine's maximum safe depth in salt water?
The pressure inside the submarine is maintained at 1.0 atm.

Respuesta :

Answer:

The maximum safe depth in salt water is 3758.2 m.

Explanation:

Given that,

Diameter = 20 cm

Radius = 10 cm

Thickness = 9.0 cm

Force [tex]F = 1.2\times10^{6}\ N[/tex]

Inside pressure = 1.0 atm

We need to calculate the area

Using formula of area

[tex]A=\pi\times r^2[/tex]

Put the value into the formula

[tex]A=\pi\times(10\times10^{-2})^2[/tex]

[tex]A=0.0314\ m^2[/tex]

We need to calculate the pressure

Using formula of pressure

[tex]P=\dfrac{F}{A}[/tex]

Put the value into the formula

[tex]P=\dfrac{1.2\times10^{6}}{0.0314}[/tex]

[tex]P=38216560.50\ Pa[/tex]

[tex]P=3.8\times10^{7}\ Pa[/tex]

We need to calculate the maximum depth

Using equation of pressure

[tex]P=P_{atm}+\rho gh[/tex]

[tex]h=\dfrac{P-P_{atm}}{\rho g}[/tex]

Put the value into the formula

[tex]h=\dfrac{3.8\times10^{7}-101325}{1029\times9.8}[/tex]

[tex]h=3758.2\ m[/tex]

Hence, The maximum safe depth in salt water is 3758.2 m.