Levitating clocks

A spherical magnet hangs 1 cm from the clock and rotates in a circle and is the second hand.

This happens due to the electromagnetic coils and Hall sensors installed inside.

How warm and cold water mix

Warm water is less dense than cold one. And anything that is less dense tends upwards, while anything that is more dense tends downwards.

Start a fire with ice?

That's easy.

Just make a collecting lens out of a piece of ice in which the central part is thicker than the periphery.

Fire making with lenses is based on the fact that the sun's rays and the heat energy they carry are concentrated in one point due to the refraction of the light by the walls of the lens. If a flammable rubbish is placed at this point, it will quickly heat up and begin to smolder.

Infinity Mirror 🪞

The basic idea of the product is the combination of an ordinary mirror, partially transparent glass (mirror) in front of it and diode illumination.

Due to the fact that the point light sources are reflected in the outer and inner mirrors repeatedly, there is an effect of gradual "fading", a sense of depth.

Experiment with the Jeep Wrangler 🚙

SUV behavior on the road with square, hexagonal, oval and triangular wheels.

Capillarity

The capillary effect is the rise or fall of a liquid in narrow channels or porous bodies. This is due to the fact that the liquid tends to wet the surface of the channel and rise up, despite the force of attraction.

Testing the strength of a chicken egg 🥚

Acoustic dispersion

When a sound wave passes through a solid medium (e.g. ice), high and low frequencies separate. Being faster, the high-frequency waves travel ahead of their low-frequency counterparts. As a result, you may hear a gap between the high notes and the low notes contained in the same sound.

Iron can burn❗️

Under normal conditions, the oxidation rate of iron depends strongly on its form: a simple piece of metal does not burn, but thin fibers of iron or fine powder can easily be ignited.

It all depends on the contact surface of the iron with the air: it should be enough so that the oxidation reaction can sustain itself.

Iron wool consists of fairly thin fibers of iron. Oxidation on such a surface produces enough heat to keep the reaction going, and it runs "on its own”.

Laminar flow

This is a flow in which a fluid or gas moves in layers without stirring or pulsation (i.e. without random rapid changes in velocity and pressure).

Laminar flow is observed at low velocities of the fluid. The outer layer of liquid adjacent to the surface of the pipe in which it flows sticks to it due to the forces of molecular adhesion and remains immobile.

Anodizing⚡️

It is a method of increasing the corrosion resistance of a metal product by forming an oxide layer on its surface.

Uncommon swirls of water on the porthole of the plane.

Quite an interesting phenomenon in the pool

It's all thanks to the solar film, with polyethylene and a heat reflective surface underneath, covering the surface of the pool.

Subtractive color mixing with a cube.

Instant water freezing at -30 °C.

When the shell is covered with a thin layer of charcoal, air remains in the pores.

Immersed in water, the egg is "clothed" in an air shell, which refracts light and creates a mirror-like surface.

Interesting visualization of keyboard play.

A funny manifestation of static electricity.

The Weissenberg effect

An effect characteristic of some non-Newtonian fluids. Instead of being thrown outward, a chain of polymers is coiled onto a rod.

Technically, this phenomenon is as follows: if a rotating rod is placed in a container with a polymer solution, the liquid level around the rod will begin to rise, the solution will be "wrapped" around the rod.

A Christmas balloon that generates snow

It required a power supply, a cooling fan, radiators and a PC CPU cooler.

The creator cut a tiny snowman out of aluminum so that the snow could grow somewhere. A couple of 2 watt resistors were also added to evaporate water.

And you can have fun with physics, too.