Final answer:
Pressure at the bottom of a swimming pool increases with depth, and at 10.3 m, the total pressure is around 2 atm, which includes both the water's and atmosphere's weight.
Step-by-step explanation:
The pressure at the bottom of a swimming pool increases with depth due to the weight of the water above. This is in line with the principles of fluid mechanics which state that the pressure in a fluid near Earth's surface changes with depth.
The pressure at a depth in a pool also includes atmospheric pressure, adding to the total pressure experienced by an object submerged at that depth. So at a depth of 10.3 m, the total pressure would be approximately 2 atmosphere (atm), with one being from the water and the other from the overlying atmosphere.