Physics Physics Fluid Dynamics

Question 1

What is the SI unit of pressure?

Accepted Answer

Pascal

Answer

The SI unit of pressure is the Pascal (Pa), equal to one Newton per square meter.

Question 2

What is the buoyant force on a submerged object equal to, according to Archimedes' principle?

Accepted Answer

Weight of fluid displaced

Answer

Archimedes' principle states that the buoyant force equals the weight of the fluid displaced by the object.

Question 3

Which property of a fluid describes its resistance to flow?

Accepted Answer

Viscosity

Answer

Viscosity is the measure of a fluid's resistance to deformation or flow, often described as the 'thickness' of a fluid.

Question 4

In the hydrostatic pressure equation P = P₀ + ρgh, what does g represent?

Accepted Answer

Gravitational acceleration

Answer

In the hydrostatic pressure equation, g represents the acceleration due to gravity (approximately 9.8 m/s²).

Question 5

The continuity equation in fluid dynamics is based on which conservation law?

Accepted Answer

Conservation of mass

Answer

The continuity equation states that for an incompressible fluid, the mass flow rate must remain constant, based on conservation of mass.

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