The Tech Techy

Just Techy Things

Menu
  • Home
  • Application
  • Business
  • Gadgets
  • How to?
  • News
  • Technology
Menu

Explain the Magnitude of Atmospheric Pressure ?

Posted on June 23, 2019 by admin
Advertisement

Magnitude of Atmospheric Pressure


We know that ‘pressure is force per unit’. Now, if we imagine a unit area of ​​the Earth’s surface and a very high “air-filled” column, the weight of the air in that column is the atmospheric pressure at that place. Since the SI unit of area is ‘square metre’, therefore, we can also say that atmospheric pressure is equal to the weight of air present in a very tall column of air standing on 1 square metre area of the earth.

On the surface of earth, the atmospheric pressure is maximum at the sea level. This is because the air column above us is the highest at sea level. Therefore, the magnitude of the atmospheric pressure is very large. The atmospheric pressure on the surface of earth (at the sea level) is 342.4 kilo pascals which is equivalent to the weight of ten elephants pressing on each square metre area ! As we go up in the atmosphere form the surface of earth, the atmospheric pressure goes on decreasing. This is because as we go up in the atmosphere, the weight of air above us goes on decreasing (due to which the pressure also goes on decreasing). So, the atmospheric pressure on the top of a high mountain will be much less than at its base.

Please note that though the SI unit of pressure ins pascal (Pa) but atmospheric pressure is usually measured in the unit of ‘millimeters of mercury’ (mm of mercury) for the sake of convenience in measuring it. Thus, the common unit for expressing and measuring atmospheric pressure is ‘millimeters of mercury’ (mm of mercury). The atmospheric pressure on the surface of earth (at the sea level) is 749 mm of mercury.

ACTIVITY TO SHOW THE EXISTENCE OF ATMOSPHERIC PRESSURE


We will now describe an activity to show the existence of atmospheric pressure. In this activity we will use atmospheric pressure to hold water in an inverted glass tumbler. This activity can be performed as follows : A glass tumbler is filled to the brim with water and covered with a piece of thick and smooth card. We pressed the card hard so that there was no air in the glass. Hold the card in place with one hand and we invert the glass filled with water. The hand supporting the card is then withdrawn slowly. We will see that the piece of card does not fall though the tumbler is full of water and exerts pressure on the card in the downward direction. The card does not fall because the atmospheric pressure acts on the card in the upward direction and holds the card in place. The upward atmospheric pressure acting on the card is greater than the downward pressure of water on the card.

Before we describe the next experiment to show the existence of large atmospheric pressure around us, we should know the meaning of the term ‘hemispheres’. ‘Hemispheres’ mean ‘half spheres’. Joining together of two hemispheres makes one complete sphere. Let us describe the experiment now.

Advertisement

Leave a Reply Cancel reply

You must be logged in to post a comment.

Search

Follow US on

Recent Posts

  • How To Create Your Account In Google Play Store?
  • 5 Ways to Make Extra Income Even With Online Plateform
  • What Is SBI Virtual Card?  How To Get SBI Virtual Card?
  • How To Download The Premium Application Absolutely Free?
  • Skullcandy Spoke TWS (True Wireless Stereo) Earbuds Review In Hindi

Archives

  • March 2021
  • February 2021
  • January 2021
  • December 2020
  • November 2020
  • October 2020
  • September 2020
  • August 2020
  • July 2020
  • May 2020
  • April 2020
  • March 2020
  • February 2020
  • January 2020
  • December 2019
  • November 2019
  • October 2019
  • September 2019
  • August 2019
  • July 2019
  • June 2019

Categories

  • Application
  • Business
  • Gadgets
  • How to?
  • News
  • Technology
  • Uncategorized

Topic

. DRINKING STRAW 2. Frictional force (or Friction) 3 people arrested 3. Magnetic force 4. Electrostatic force ACTIVITY DEMONSTRATE THAT A LIQUID EXERTS EQUAL PRESSURE AT THE SAME DEPTH Aditya Roy Kapur’s Sadak 2 A Force can Change the Shape and Size of an Object Alia Bhatt and  5. Gravitational force. and  Gravitational force. angry at Jim Trainer Arjun Patiala Arjun Patiala: Sunny leone item songs released arrest Article 15 Box-Office Collection Ayushmann Khurrana Ayushmann Khurrana Article 15 Barkot in Uttarkashi region BCCI Bharatiya Janata Party (BJP) Bhayyaji Joshi BJP BJPINDIAN ADMINISTRATIVE SERVICE (IAS)LOK SABHA RESULTS BJP scores 10/10 in Haryana BJP’s Kummanam Rajasekharan Box-Office Collection Day 12 Box office: 50 million is one step away Article 15 Casino Royale Cause of Friction celebrate-TEEJ-mahotsav-dehradun-local-uttarakhand Chai pe Charcha Congress General Secretary Priyanka Gandhi Vadra Crazy Habibi VS Decent Munda CSDS-Lokniti Daniel Craig David Warner dehradun-city-local Delhi Dharambir Singh w Diljit Dosanjh Donald Trump o ICC World Cup 2019 RSS Virat Kohli

Site Information

  • About Us
  • Contact Us
  • Disclaimer
  • Privacy Policy

Get Latest Updates Via Email

Loading

About Us

Business, Gadgets, How to?, News, Technology, Related Post is our core area of writing, however we also post about the Latest News and More. A full list of the topics we cover Can Be Found in The Website. https://www.thetechtechy.com/
©2021 The Tech Techy | Design: Newspaperly WordPress Theme