Lower a pressure probe
A deeper probe supports a larger liquid column and reads greater pressure. Density determines the slope. Container shape does not affect pressure at a given depth in the same connected liquid.
Run this experiment →Physics · Class 11
Mechanical Properties of Fluids
10 free physics experiments and lesson notes for Mechanical Properties of Fluids, with model limits, worked examples and Tamil explanations.
Link a pair of pistons
A pressure increase applied to a confined fluid reaches both pistons. The larger piston produces more force, but moves a smaller distance so the ideal lift conserves work.
Run this experiment →Submerge a floating object
Buoyancy equals the weight of displaced liquid. At equilibrium a floating object displaces its own weight, rather than its whole volume. Objects denser than the liquid cannot float freely in this model.
Run this experiment →Drop a sphere through viscous liquid
Weight, buoyancy and viscous drag determine a falling sphere’s speed. As speed grows, drag grows until the net force vanishes and the sphere reaches terminal speed. Viscosity lowers this limiting speed.
Run this experiment →Find the pipe-flow transition
Reynolds number compares inertia with viscous effects. A larger speed or diameter promotes transition, while higher viscosity favours laminar flow. The threshold is approximate rather than a universal switch.
Run this experiment →Narrow a flowing pipe
Continuity speeds up liquid where a pipe narrows. Bernoulli links this kinetic-energy increase and any height increase to a pressure decrease. The outlet area control changes both speed and pressure.
Run this experiment →Drain a tank and compare lift pressure
A liquid head becomes jet kinetic energy, giving an exit speed proportional to the square root of head. In the separate air example, faster flow above than below gives lower pressure above and a net upward pressure force.
Run this experiment →Stretch a two-sided liquid film
Creating more liquid surface requires energy. A soap film has two faces, so its force and energy contain a factor of two. Contact angle controls the sign of the wetting term and distinguishes rise from depression in capillary systems.
Run this experiment →Compare a drop and soap bubble
Surface tension makes the interior pressure exceed the exterior pressure. Smaller spheres need a larger pressure difference. A thin soap bubble has two interfaces and twice the excess pressure of a drop at the same radius and tension.
Run this experiment →Change tube radius and wetting
Surface tension around the tube balances the weight of the raised liquid column. Smaller radius produces a larger rise. A contact angle above 90° reverses the sign, producing capillary depression.
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