Measurement of pressure

  • Barometer is used for the measurement of pressure.
  • Why mercury is used in barometers?
    i) With mercury, practically no vapours are produced
    ii) Mercury does not wet or stick with glass
    iii) It is shining and opaque, so readings can be easily taken
  • A gradual fall in the atmospheric pressure indicates a steady increase in the atmospheric water vapour, and rain may occur.
  • A steady rise in the atmospheric pressure shows a gradual fall in the atmospheric water vapour and indicates a fair weather.
  • A sudden fall in atmospheric pressure predicts a storm.
  • The boiling point of a liquid increases with the increase in pressure on its surface.
  • On higher altitudes, the pressure of atmosphere is less. Thus, water starts boiling below 100 degree Celsius. As cooking temperature of rice, pulses, meat etc. is slightly above 100 degree Celsius, therefore they do not cook well on hills.
SEE ALL Add a note
YOU
Add your Comment

Recent Posts

  • MR Jayakar

    A moderate Congress leader and member of the Congress Committee to enquire into...

  • Narendra Dev

    An eminent educationist. He was the Acharya or principal of Kasi Vidyapitha in...

  • Sir William Waderburn

    Sir William Waderburn, was the only British to become the President of Congress...

Course Categories

About Us

Ekalawya, the online guru is there it help with its extensive base of most repeated questions and answers covering all areas of interest. We keep updating too, so that no major developments are lost from our current affairs scanner.
More
© Ekalawya | Built and hosted by Teezonic Creative Studio LLP

Course Categories

top
X
Skip to toolbar