Question

Describe in brief the working mechanism of a syringe.

Answer 1

Bernoulli's Principle (simplified): Pressure*Volume=Pressure*Volume, for constant temperature.

As you decrease the volume within the syringe, the pressure increases until it exceeds that of the external environment. This pressure is usually slightly above atmospheric pressure (see blood pressure). At this point fluid is forced out the syringe opening into surrounding environments. Likewise, you can also draw material into the syringe utilizing the reverse process.

This process is identical to a balloon deflating.

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Answer 2

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