what do we need to calculate pressure
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Answer:
Barometer
Explanation:
A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around the Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure.
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ANSWER :
BAROMETER
(MARK AS BRAINLIST)
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