How Is Total Pressure Calculated in Water?

AI Thread Summary
Total pressure in water is calculated using the equation Pnet = Pair + ρgh, where Pair is the air pressure, ρ is the water density, g is the acceleration due to gravity, and h is the depth. Given the values of air pressure at 10^5 Pa, water density at 10^3 kg/m^3, and a depth of 2m, the calculation results in Pnet = 10^5 + (10^3 * 10 * 2). The correct total pressure is not explicitly calculated in the discussion, but the process highlights a common mistake in not performing the final calculation. The discussion emphasizes the importance of proper scientific notation in presenting answers.
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Homework Statement



Assuming g = 10 ms^-2 and the volumetric mass for water is 10^3 kg.m^-3 and the air pressure is 10^5 Pa, the total pressure on a point inside the water that's in equilibrium with a distance of 2m from its free surface is:

A. 0.8 * 10^5

B. 1.002 * 10^5

C. 1.2 * 10^5

D. 1.02 * 10^5

Homework Equations

The Attempt at a Solution



What I did was apply: Pnet = Pair + ρ*g*h

Pnet = 10^5 + 10^3 * 10 * 2

Pnet = 10^5 + 10^4 *2What am I doing wrong?
 
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Why do you think you are doing something wrong?
 
Oh nevermind, lock this.

I never bothered to actually calculate how much is 10^5 + 10^4 * 2
 
Try writing your answer in proper scientific notation...
 
:oldsurprised:
 

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