Physics · Pressure due to a fluid column, Pascal's law and its applications, effect of gravity on fluid pressure
Under same depth, atmospheric pressure is water pressure.
Under same depth, atmospheric pressure is water pressure.
- A. less than
- B. greater than
- C. equal to
- D. none of these
Step-by-step solution
In a fluid, pressure at a depth h is given by P = P_atm + ρgh, where ρ is the density and g is gravity. Since ρgh > 0 for h>0, the total pressure at any depth below the surface is greater than atmospheric pressure. Hence, atmospheric pressure is less than water pressure at the same depth.
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