Multiple choice

A tank has an orifice at its bottom. The volume of the liquid flowing per second out of the orifice does not depend upon

  1. the area of the orifice

  2. the height of the liquid level above the orifice

  3. the density of the liquid

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

According to Torricelli's law, the volume of liquid flowing per second through an orifice depends on the orifice area (A) and the height of liquid above it (h), with flow rate proportional to A × sqrt(2gh). It doesn't depend on liquid density because both gravitational force and inertia scale with density, cancelling out in the equation.

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