Answer
Verified
427.2k+ views
Hint: We are required to find the total pressure exerted on him because that is the amount of pressure he had to withstand. The total pressure will be the sum of that exerted by water as well as atmosphere. Pressure exerted by the atmosphere has a constant value i.e. \[1.01 \times {10^5}pa\] but that exerted by water which is a fluid depends upon other physical quantities.
Complete Step by step answer:
It is given that the density of water $\left( \rho \right)$ is 1024 kg/m³, and the height (h) he covered (depth) is 10.9 km.
The pressure that he had to withstand is the pressure that is exerted by the water as well as the atmosphere. So the total pressure is given as:
\[{P_{total}} = {P_{atm}} + {P_{hydro}}\] ____ (1)
As water is a fluid, the pressure exerted by it will be equal to the fluid pressure, so it can be given as:
\[{P_{hydro}} = \rho gh\] and here,
Density $\left( \rho \right)$ = 1024 kg/m³ (given)
Height (h) = 10.9 km or \[\left( {10.9 \times {{10}^3}} \right)m\] [As 1 km = 1000 m]
Acceleration due to gravity (g) = \[9.8m/{s^2}\]
$ \Rightarrow {P_{hydro}} = 1024 \times 9.8 \times \left( {10.9 \times {{10}^3}} \right)$
And the known value of atmospheric pressure is :
\[{P_{atm}} = 1.01 \times {10^5}pa\]
Substituting the values in (1), we get:
\[
{P_{total}} = 1.01 \times {10^5}pa + 1024 \times 9.8 \times \left( {10.9 \times {{10}^3}} \right) \\
\Rightarrow {P_{total}} = {10^3}\left( {1.01 \times {{10}^2} + 1024 \times 9.8 \times 10.9} \right) \\
\Rightarrow {P_{total}} = {10^3} \times 109596.296 \\
\therefore {P_{total}} = 1.09 \times {10^8} \\
\]
The SI unit of pressure is Pascal (pa) so:
\[{P_{total}} = 1.09 \times {10^8}pa\]
Therefore, the approximate the hydrostatic pressure (in atmospheres) that the Trieste had to withstand was \[1.09 \times {10^8}pa\]
Note: As the density was given in \[kg/{m^3}\], we could not take the height in km and thus converted the same to m so as to keep units like.
For calculations, remember that for the same base number, the powers will be added when multiplied and subtracted when divided.Any substance possessing the property to flow and has viscosity (thickness) is called as fluid, it can be liquid, gas or even plasma Always answer the question with appropriate SI Units, SI Unit of pressure is pascal (pa)
Complete Step by step answer:
It is given that the density of water $\left( \rho \right)$ is 1024 kg/m³, and the height (h) he covered (depth) is 10.9 km.
The pressure that he had to withstand is the pressure that is exerted by the water as well as the atmosphere. So the total pressure is given as:
\[{P_{total}} = {P_{atm}} + {P_{hydro}}\] ____ (1)
As water is a fluid, the pressure exerted by it will be equal to the fluid pressure, so it can be given as:
\[{P_{hydro}} = \rho gh\] and here,
Density $\left( \rho \right)$ = 1024 kg/m³ (given)
Height (h) = 10.9 km or \[\left( {10.9 \times {{10}^3}} \right)m\] [As 1 km = 1000 m]
Acceleration due to gravity (g) = \[9.8m/{s^2}\]
$ \Rightarrow {P_{hydro}} = 1024 \times 9.8 \times \left( {10.9 \times {{10}^3}} \right)$
And the known value of atmospheric pressure is :
\[{P_{atm}} = 1.01 \times {10^5}pa\]
Substituting the values in (1), we get:
\[
{P_{total}} = 1.01 \times {10^5}pa + 1024 \times 9.8 \times \left( {10.9 \times {{10}^3}} \right) \\
\Rightarrow {P_{total}} = {10^3}\left( {1.01 \times {{10}^2} + 1024 \times 9.8 \times 10.9} \right) \\
\Rightarrow {P_{total}} = {10^3} \times 109596.296 \\
\therefore {P_{total}} = 1.09 \times {10^8} \\
\]
The SI unit of pressure is Pascal (pa) so:
\[{P_{total}} = 1.09 \times {10^8}pa\]
Therefore, the approximate the hydrostatic pressure (in atmospheres) that the Trieste had to withstand was \[1.09 \times {10^8}pa\]
Note: As the density was given in \[kg/{m^3}\], we could not take the height in km and thus converted the same to m so as to keep units like.
For calculations, remember that for the same base number, the powers will be added when multiplied and subtracted when divided.Any substance possessing the property to flow and has viscosity (thickness) is called as fluid, it can be liquid, gas or even plasma Always answer the question with appropriate SI Units, SI Unit of pressure is pascal (pa)
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Which are the Top 10 Largest Countries of the World?
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Write a letter to the principal requesting him to grant class 10 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE