SI unit of Pressure | What is the SI Unit of Pressure
Dear students in this article we are going to study about the very useful unit in physics. It is helpful in understanding the flow of water, hydraulic lift, hydraulic press and many more concepts.
Sir Blaize Pascal was the renowned French mathematician, physicist and scientist. His contribution in field of mathematics to study theory of probability, binomial expansion using Pascal’s triangle played vital role in modern mathematics.
We know that, pressure is force acting per unit area
Then the formula for pressure is given as,
∴ Pressure = (Force )/Area
∴ Pressure = (F )/A
Sir Blaize Pascal has contributed in physics to explain the concept of pressure exerted by fluid at rest. Pascal’s law stated as “The pressure applied to any part of fluid at rest is transmitted equally, undiminished in all parts of fluid and to the wall of vessel.”
Considering the contribution of Sir Blaize Pascal in physics, unit of pressure is given as pascal. It is written as pascal, and its symbol is Pa.
Hence,
From the above equation, SI unit of pressure can me written as,
newton / (meter)2 or N / m2
N / m2 = Pa.
If one wants to convert pascal in to CGS, then
We know that,
∴ 1 newton = 10^5 dyne
∴ 1 N/m^2 = 10^5 dyne)/10^4 cm^2
∴ 1 N/m^2 = 10^1 dyne/cm^2
∴ 1 Pa = 10 dyne/cm^2
Here dyne/cm^2 is also written as barye
∴ 1 Pa = 10 bar
(where bar is CGS unit force)
Important Faq on SI unit of Pressure
Q.1) What is use of Pascal’s triangle?
Answer: Pascal’s triangle is useful to understand the concept of expansion of arithmetic equation of higher order. The expansion method/theory i.e. binomial expansion uses Pascal’s triangle.
Q.2) What are applications of Pascal’s law of pressure in practical life?
Answer: Pascal’s law is useful in understanding the working of Hydraulic brakes, hydraulic lift, flow of water in pipe etc.
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