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What will be the gauge pressure and the absolute pressure of water at depth 12m below the surface?

Answer 1

Lily Adams

(a). #117"kPa"#

(b). #217"kPa"#

Gauge pressure plus atmospheric pressure equals absolute pressure.

The pressure due to the liquid alone is called "gauge pressure" and is determined by:

#"GP"=rhogh#

= #10^(3)xx9.8xx12=1.17xx10^(5)N.m^(-2)#

#=117"kPa"#

To get the absolute pressure we need to add on the pressure due to the weight of the air above it. We add on the atmospheric pressure which I will assume to be #100"kPa"#

Absolute pressure #= 117 + 100=217"kPa"#

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Answer 2

Adrian Ayala

The gauge pressure of water at a depth of 12m below the surface is approximately 117.6 kPa, and the absolute pressure is approximately 232.6 kPa.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.