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. |
The pressure exerted by a liquid: | |||
Right Option : A | |||
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The atmospheric pressure is due to the | |||
Right Option : B | |||
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Which of the following parameters decreases as we go up ? | |||
Right Option : C | |||
View Explanation |
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About 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.
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Usually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Third 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 ...
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Abhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Abhyas 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...
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
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.
We started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
In 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...
When I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.