Answer / pranay

vacuum created by extracting air from closed chamber

Answer / pp13900

Press a suction cup flat against a wall and pull back, the inside of the cup will contain a vacuum

Answer / l.anil kumar

We create the vacuum due to eject the water from a closed vessel

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hallo I am looking for technical theortical knowledeg in air flow inside pipe and tunel's such as resisten of surefa's calculation and sempal's of calculation hopethat some budy can halp my thank you from devas

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why we are maintain boiler ph 9.0,not maintain 10.0 or 11?

2 Answers  

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