Answer: Pressure applied to an enclosed fluid is transmitted equally in all directions.
- A Pressure applied to an enclosed fluid is transmitted equally in all directions
- B Pressure in a fluid increases linearly with depth below the surface as frequently described
- C The buoyant force equals the weight of fluid displaced by the body in most textbook accounts
- D Fluid usually flows from a region of high pressure to low pressure during normal conditions
Correct answer: A. Pressure applied to an enclosed fluid is transmitted equally in all directions
Explanation: Pascal's law: a change in pressure applied to an enclosed fluid is transmitted undiminished to every point of the fluid and to the walls of its container.
Since the same volume of fluid must pass every cross-section per second (continuity), the fluid speeds up where the pipe narrows; Bernoulli's equation then says this faster-moving fluid has lower pressure - the principle behind a venturi meter and an aircraft wing's lift.
Concept context
Pressure, buoyancy, Bernoulli equation, viscosity, and surface tension.