How Is Total Pressure Calculated in Water?

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Homework Help Overview

The discussion revolves around calculating total pressure at a point in water, considering factors such as gravitational acceleration, water density, and atmospheric pressure. The problem is situated within the context of fluid mechanics.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply the equation for net pressure, combining atmospheric pressure with hydrostatic pressure. Some participants question the accuracy of the calculations and the need for proper scientific notation.

Discussion Status

The discussion is ongoing, with participants exploring the calculations involved. There is an indication that some guidance has been offered regarding the presentation of the answer, but no consensus has been reached on the correctness of the original calculation.

Contextual Notes

Participants are working under the assumption that the values provided for gravitational acceleration and water density are accurate, and there is a mention of a specific distance from the water's surface that is relevant to the calculations.

NooDota
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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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