Pressure 150m Below Sea Surface: Calculate Now!

[sodr2]

Homework Statement

Calculate thy pressure 150m below the surface of za sea. The density of sea water is 1.026 g/cm³.


2. Homework Equations & The attempt at a solution
The pressure will depend on how much water is above you...

F = mg
F = pVg --- since density = mass per volume
F = pAdg --- since volume = area * depth
F/A = pdg
Therefore Pressure = pdg

------conversion of units--------
9.8 m/s² * 100 cm/1 m = 980 cm/s²
150 m = 15 000 cm
--------------------------------

P = (1.026 g/cm³) * 150 000 cm * (980 cm/s²)
P = 150 822 000 g/cm²

But my textbook says 1.51 x 10⁷ dyn/cm² (= 15 atm)

So is my textbook wrong, or what did I do ?

 

[sodr2]

Btw, what is dyn?

 

[Borek]

150 m = 15 000 cm
--------------------------------

P = (1.026 g/cm³) * 150 000 cm * (980 cm/s²)

http://en.wikipedia.org/wiki/Dyne

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[sodr2]

Thanks.