Haven't you seen an injection needle fixed at the top of a drip bottle when a drip is administered to patients in hospitals? Why?

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Solution

Pressure is force which is perpendicular to area in force is applied

formula,

Pressure=force/area

If an injection needle is not fixed at the top of the drip bottle,

So that the medicine does not flow into the patient's body.

Because the pressure inside the drip bottle is less than that of the atmospheric pressure.

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