A pitot tube measures the velocity in a flow by sensing:
Choose the correct answer
Static pressure only
Total (stagnation) pressure only
The difference between stagnation and static pressure
Dynamic pressure directly from velocity
Correct Answer
C. The difference between stagnation and static pressure
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Pitot-static tube: V = sqrt(2(p0 - p_static)/rho) = sqrt(2 x Delta_p / rho), where p0 = stagnation pressure (at tip), p_static = static pressure (side holes). The differential pressure gives velocity.
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