Question

10 When the diver is 8 meters 1p below the surface, the pressure gauge on his air tank reads 60 kPa. The gauge pressure will be O at what depth?* *​

Answer 1

Pressure at 10 m depth = Patm + ?gh = 101.325 + 1000*9.80665*8/1000 = 179.778.

Answer 2

Given: the diver is $8m$ below the surface. Pressure on air tank is $60kPa$.

To find: the depth at which the gauge pressure will be zero.

Step-by-step method:

Step 1 of 2

The total pressure is calculated by the formula:

$P_{TOTAL} =P_{GAUGE} +P_{ATM}\\P_{TOTAL} =60,000+1,01,325\\P_{TOTAL} =161325\\P_{TOTAL} =161.325kPa$

Step 2 of 2

The gauge pressure will be 0 at a depth of:

$P_{TOTAL} =P_{GAUGE} +P_{ATM}\\161325=0+rgh\\161325=998*9.8*h\\h=\frac{161325}{998*9.8} \\h=16.49m$

The gauge pressure will be 0 at a depth of $16.49m$.