While sucking on a straw, you create a partial vacuum in yourmouth. If a person

Question

While sucking on a straw, you create a partial vacuum in yourmouth. If a person can make a partial vacuum in her mouth equal to50% of atmospheric pressure, how long of a straw can she drinkwater out of? PLEASE EXPLAIN IT CLEARLY AND NEATLY! i really appreciateit!! While sucking on a straw, you create a partial vacuum in yourmouth. If a person can make a partial vacuum in her mouth equal to50% of atmospheric pressure, how long of a straw can she drinkwater out of? PLEASE EXPLAIN IT CLEARLY AND NEATLY! i really appreciateit!!

Explanation / Answer

Gauge pressure is the difference in absolute pressure andatmospheric pressure. So the gauge pressure created by thechild's mouth would be the absolute pressure (.5* Patm)subtracted by the atmospheric pressure (Patm). Basically, it is a way to simplify problems by referencing apressure against atmospheric pressure.

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