Soap boat. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Soap boat. The Secret of Focus

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

You will need cardboard, liquid soap, a basin, and a hearth. Cut out a simple boat from cardboard. Fill the basin with milk and discreetly dip your finger into the liquid soap.

Show the audience the boat. Invite them to lower it into the water and make sure it doesn't sink. The fact that she is motionless proves that she needs a motor.

Announce to everyone that you have invented the smallest boat motor that can be found in the world - so microscopic that it is not even visible. Pretend to take it out of your pocket. Paint an elegant shape, excellent design, pleasant coloring.

Next, take the imaginary motor from the audience and attach it to the boat. Until then, you should not touch anything with your soapy finger. But as soon as you have depicted that the motor is attached to the boat, touch the place next to the Y-shaped cut with this finger (a cross in the picture). Now, as soon as you launch the boat, it, to the surprise of everyone, will rush to the other side of the basin.

Focus secret:

Before the advent of soap, equal forces of surface tension pulled the boat in all directions. The soap weakened the interaction of the water with the boat at the stern, and the tension force at the bow set the boat in motion.

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Researchers at the University of California, Los Angeles (UCLA) have succeeded in improving the properties of a metal using ceramic nanoparticles. The resulting ceramic-metal composite turned out to be very strong and light. It contains magnesium and silicon carbide (86% and 14% respectively), and applications include aircraft and spacecraft, automobiles and mobile electronic devices.

It was possible to increase the specific strength and the modulus of longitudinal elasticity due to the introduction of silicon carbide nanoparticles into the metal. The illustration shows the deformation of a metal microparticle (left) and a composite in which such a particle is surrounded by ceramic nanoparticles (right). The diameter of the metal column is about 4 µm.

The idea of improving the structural qualities of a metal by adding ceramics is not new, but its implementation is associated with solving the problem of a uniform distribution of nanoparticles that tend to form "lumps". Scientists from UCLA have developed a new method that ensures uniform distribution of nanoparticles in the melt. It is built on the use of the kinetic energy of particles.

To further increase the strength, compression of the material by means of severe plastic deformation is used.

Scientists note that the method they have developed can be transferred to industrial production, and the results obtained are only the first steps in mastering a new class of materials.

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