Bernoulli's equation is the fundamental equation in fluid dynamics that relates pressure of fluid to its speed and height.According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be
Correct answer: A. Low.
- A. Low.
- B. Zero.
- C. High.
- D. Constant.
Explanation
According to Bernoulli's equation, in a streamline flow, the sum of the pressure energy, kinetic energy, and potential energy per unit volume is constant. When the speed of a fluid increases, its kinetic energy increases, and to maintain the energy balance, the pressure energy (pressure) must decrease. Therefore, where the speed of the fluid is high, the pressure is low. Option A is correct. Option B is incorrect because pressure rarely becomes zero except in a vacuum. Option C is incorrect because higher speed correlates with lower pressure, not higher pressure. Option D is incorrect because pressure changes with speed and height, so it is not constant.
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About Bernoulli's Equation
Bernoulli’s equation applies conservation of energy to steady flow of an incompressible, non-viscous fluid along a streamline: pressure, kinetic and gravitational terms have a constant total. It explains pressure-speed changes in narrow pipes, Venturi meters and lift, and differs from continuity because it relates pressure as well as velocity and height.
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