Acoustic levitation

If you take two speakers with equally oscillating membranes and place them opposite each other at a certain distance, a standing wave will occur between them.

The wonders of hydrostatics

In a resting fluid, there is always a pressure force called hydrostatic pressure. The fluid exerts a force on the bottom and walls of the vessel.

In this case, the water squeezed out the carbon dioxide and filled the empty space. This equalized the pressure in the bottle and the pool, so the cola didn't leak out.

This tiny battery-powered car overcomes gravity through centripetal acceleration and light friction against the glass surface.

A moving illusion

Each ball flies in a straight line, but ends up forming an illusion of counterclockwise motion.

Lenticular raster

An array of flat-convex cylindrical collecting lenses positioned over an image or light-sensitive layer for reading or recording raster color or three-dimensional images.

Slow-motion footage of the moment the light bulb burns out

Halogen, energy-saving, LED bulbs frequently burn out due to a sudden voltage spike.

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.