[H] Fluids Homework

Front

What is a fluid?

Back

A fluid is a substance that can flow and take the shape of its container. Fluids include liquids and gases.

Front

Define density in the context of fluids.

Back

Density is the mass per unit volume of a substance, typically expressed in kg/m³ for fluids.

Front

What is the principle of buoyancy?

Back

The principle of buoyancy states that an object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced by the object.

Front

Explain Pascal's principle.

Back

Pascal's principle states that a change in pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid.

Front

What is viscosity?

Back

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

Front

How does temperature affect the viscosity of a fluid?

Back

Generally, as temperature increases, the viscosity of a liquid decreases, making it flow more easily.

Front

What is the equation for calculating pressure in a fluid?

Back

Pressure (P) in a fluid is calculated using the formula P = F/A, where F is the force applied and A is the area over which the force is distributed.

Front

Define hydrostatic pressure.

Back

Hydrostatic pressure is the pressure exerted by a fluid at rest due to the weight of the fluid above it, calculated as P = ρgh, where ρ is the fluid density, g is the acceleration due to gravity, and h is the height of the fluid column.

Front

What is the continuity equation in fluid dynamics?

Back

The continuity equation states that for an incompressible fluid, the mass flow rate must remain constant from one cross-section of a pipe to another, expressed as A1v1 = A2v2.

Front

Explain Bernoulli's principle.

Back

Bernoulli's principle states that in a flowing fluid, an increase in velocity occurs simultaneously with a decrease in pressure or potential energy.