Scientists have found evidence that Mars may once have had an ocean .5km deep. The acceleration due to gravity on Mars is 3.71m/s^2.
(a) What would be the gauge pressure at the bottom of such an ocean, assuming it was freshwater?
(b) To what depth would you need to go in the earth's ocean to experience the same gauge pressure?
guage pressure = absolute pressure - atmospheric pressure
The Attempt at a Solution
What I'm thinking is that I can calculate the absolute pressure by using p=ρgh, so p=(1000)(3.71)(500)=1855000 Pa.
But I think I'm getting a little confused about my absolute and atmospheric pressures. Absolute should be the pressure at the bottom of 500m, I believe. What should I be using for my atmospheric pressure?