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Q.

Is it true that a barometer consists of a glass tube with a narrow uniform bore?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is True.
The pressure in the air is known as atmospheric pressure. An instrument that measures atmospheric pressure is a barometer. Italian scientist Evangelista Torricelli invented it in 1643. This instrument has a narrow uniform bore and consists of a glass tube, and the length of this glass tube is about 100 cm. Barometric liquid mercury is filled in this glass tube, and one of these glass tubes is closed.
 
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