Such kind of pendulum is a straightforward physical system, exhibiting a variety of dynamic behavior with significant dependence on initial conditions.

A shower head shaping a stream in the form of a single-band hyperboloid.

Curie-effect heat engine

The rotor is a circle of magnetic material. A magnet is fixed next to it. The rotor in one place, locally, is heated to Curie temperature, as a consequence of which the magnetic coupling temporarily disappears and the rotor-stator circuit is out of a stable position.

The rotor shifts, the cold part of the rotor is moved. As the rotor rotates, the heated parts cool down and come to a heating point with a temperature below the Curie point. The whole cycle repeats.

Glue experiment

When the glue is in an enclosed space without oxygen, that is, in a tube, no chemical process occurs. Superglue only glues when it interacts with oxygen.

A realistic and most importantly working model of the transmission made of wood

The cannonball is like a float in mercury.

It does not sink only due to the fact that the density of iron is less than that of mercury.

The self-balancing cube

The secret lies in a set of flywheels under the three surfaces of the cube. Each one has an individual speed control, so by varying the rotation speed of each one, the cube can be balanced.

An exciting way to visualize music. The dance of a ferromagnetic liquid with a sound frequency.

Can one nail hold up to 12?

With knowledge of physics, you can do anything. A clear example of how to balance this design.

Synthetic diamonds

They possess a strength of 1.3-2 times greater than the resistance of natural diamonds, the breaking point of which in compression is on average 1961 MPa.

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Here's what happens to salt when it vibrates at high frequencies.

A table with a kinetic mechanism.

A little brain-breaking🤯

It's called an Ellipsograph (or Trammel of Archimedes), and if to look closely, you can notice that each ball is moving in a straight line.

A clear example of the action of centrifugal force.

Tabletop toy — the horizon of a rectangular wave.

PowerBank under pressure 🔥

The PowerBank consists of a battery installed inside, which explodes due to excessive pressure.

The "3 Tesla" magnetic resonance imaging machine has a magnet so strong that the floor below the DVD player literally sticks to the ceiling.

Stirling engine

A thermal machine in which the working body, in the form of gas or liquid, moves in a closed volume, a type of external combustion engine.

Schlieren method

It has become especially widespread for visualizing various processes in an air environment.

It is probably the only way to observe convection live. In general, this method allows to see any change of density in transparent media. For example, when a candle burns, it heats the air, reducing its density, which allows to notice the obtained heterogeneities.

Refraction is the change in the direction of a beam occurring at the boundary of the two media through which it passes