- #1

jayadds

- 42

- 0

I've come across two different formulae for pressure:

p = p0 + rho*g*h (p0 = initial pressure)

OR

p = rho*g*d

My question is, why does one of the formulae includes the initial pressure (initial pressure is often the atmospheric pressure = 1.013*10^5 Pa) in the formula whereas the other one doesn't? Do they actual calculate the same thing?

Many thanks.