HallsofIvy said:If you want to be very accurate, yes. However the atmospheric pressure adds so little to the pressure due to the fluid that most textbook problems only deal with the fluid pressure. If you are asking about problems for a course, it would be best to ask your teacher.
Total pressure at a depth in a fluid is the sum of the atmospheric pressure and the hydrostatic pressure exerted by the weight of the fluid above that depth. It is a measure of the force per unit area that the fluid exerts on a surface at that depth.
Total pressure at a depth in a fluid can be calculated using the formula P = ρgh + Patm, where P is the total pressure, ρ is the density of the fluid, g is the acceleration due to gravity, h is the depth, and Patm is the atmospheric pressure.
As the depth in a fluid increases, the total pressure also increases. This is because the weight of the fluid above the depth increases, leading to a higher hydrostatic pressure. However, the atmospheric pressure remains constant regardless of depth.
Yes, the density of the fluid does affect the total pressure at a depth. A denser fluid will exert a greater force per unit area on a surface at a certain depth, resulting in a higher total pressure.
The total pressure at a depth in a fluid will change if there is a change in atmospheric pressure. An increase in atmospheric pressure will result in a higher total pressure at a certain depth, while a decrease in atmospheric pressure will result in a lower total pressure at the same depth.