MEX-023 · Fluids, oscillations and waves Sample material

Mechanics of liquids and gases

Pressure in liquids and gases, Pascal's law, hydrostatic and atmospheric pressure, the buoyant (Archimedes) force, types of flow (laminar and turbulent), the continuity and Bernoulli equations, viscosity and Stokes' formula.

Estimated time: 2 h 50 min 7 activities

Learning objective

Master the concepts of pressure, Pascal's law and hydrostatic pressure.
Understand Archimedes' principle and the conditions for floating.
Apply the continuity and Bernoulli equations to the flow of an ideal fluid.
Learn to determine the type of flow using viscosity, Stokes' formula and the Reynolds number.

Expected outcomes

Calculates the pressure at depth, the force of a hydraulic press and the buoyant force.
Finds the speed and pressure in a pipe from the continuity and Bernoulli equations.
Uses Stokes' formula to determine a ball's terminal velocity or a liquid's viscosity.

Interactive modelFluid flow and Bernoulli's equation
Interactive modelBuoyant force

Activities

Lecture
Lecture · 1 h 15 min · required
Problem solving: fluid mechanics
Practice · 1 h 15 min · required
Determining the surface tension coefficient of liquids by counting drops
Laboratory · 2 h 30 min · optional
Determining the coefficient of internal friction (viscosity) of liquids by the Stokes method
Laboratory · 2 h 30 min · optional
Stokes' formula
Self-study · 6 h 15 min · optional
Laminar and turbulent flows
Self-study · 6 h 15 min · optional
Final test
Test · 20 min · required · pass ≥ 70%

Completion conditions

  • Lecture
  • Problem solving: fluid mechanics
  • Final test — at least 70%