Atmospheric Pressure
Atmospheric Pressure
Atmospheric pressure is defined as the pressure exerted on an object by the weight of the air above it. The atmospheric pressure on the Earths surface at sea level is about one hundred thousand pascal, i.e., 100 kPa.
| Measuring atmospheric pressure: An instrument called barometer is used to measure atmospheric pressure. It consists of long and thin tube filled with mercury and closed at one end. The open end of the tube is placed in a small trough full of mercury. The pressure exerted by air on the mercury of trough is able to hold certain height of the mercury column. When the air pressure is low, the mercury will move down, and when the air pressure increases the height of the mercury column increases. We can measure the pressure by the weight of mercury column in mm of Hg. Note: At sea level, the atmospheric pressure is 760 mm of Hg and is taken to be equal to 1 atmospheric pressure, i.e., 760 mm of Hg = atmospheric pressure at sea level. |  |
Variation of Atmospheric Pressure:
Aim: To show the presence of atmospheric pressure. Materials needed: A glass tumbler (with a smooth edge at the mouth, and withour a rim), a piece of stiff cardboard ( a little bigger than the mouth of the tumbler), and water. (It would be convenient to perform this activity over a wash basin or the kitchen sink.) Method: Observation: You will observe that the cardboard piece will not fall. Conclusion: Atmospheric pressure provides enough force to support a full glass of water. |  |
Which one of the following is used to measure the atmospheric pressaure? | |||
| Right Option : B | |||
| View Explanation |
The atmospheric pressure is due to the | |||
| Right Option : B | |||
| View Explanation |
Which of the followinh statement is NOT true. | |||
| Right Option : B | |||
| View Explanation |
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It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
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Upmanyu Sharma
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8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
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Archit Segal
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Yogansh Nyasi
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Aman Kumar Shrivastava
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Shreya Shrivastava
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10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
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Hiya Gupta
8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
