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Cleaning a ring with ultrasonic
(6) | 30/11/2020 | Translate: A diamond ring is placed in an ultrasonic cleaning machine. From the first seconds, we can see the results of ultrasonic cleaning, which sends ultrasound waves (with a frequency of 20 kHz to 170 kHz) in liquid (water or other solvent).
The hot chocolate effect The hot chocolate effect, is a phenomenon that is reproduced by stirring a hot liquid and adding soluble powder. Tap the edge of the cup repeatedly one by one the spoon, we notice that the sound produced has an increasingly louder tone. This effect is explained by fluctuations in the speed of sound in the liquid, due to the presence of gas bubbles. The wavelength of this sound that is heard, determined by the size of the cup, and the frequency of sound depends on its velocity in the liquid. The presence of air bubbles in the liquid significantly reduces this speed. So the sound sounds more bass (lower frequency) with bubbles, and thinner (higher frequency)when there are no bubbles.- Water and sound An experiment where the frequency of sound waves and water flow are synchronized with the framerate of a camcorder, creating this incredible optical illusion.
- TV cleaning in Portugal A woman in Portugal cleans her dirty TV with a water pressure washer and soap.
- Illustration of music on fire This experiment is called a Rubens tube. Each note has a wavelength and a frequency. When the notes change, the fire reflects them through the tube.
- Reflection on a rock On the walls of the Carnarvon Gorge in Australia, a man throws a stone into the water to show us the beautiful reflection of the surface waves on the rock wall.
- Forklift operator trying to pull a boat out of the water On a pier, the operator of a forklift tries to take an inflatable boat out of the water. But he won't pull the clark handbrake, and the machine will fall into the sea.
- A ring in an ultrasonic cleaner An old ring is placed in an ultrasonic cleaner.
- Motorized broom A municipal worker cleans a street using a broom equipped with a heat engine. The machine rotates two rollers that push leaves and other debris in a single pass.
- Cavitation in a glass water bottle Cavitation in a glass water bottle being hit by a hammer. Cavitation is a phenomenon in which the static pressure of a liquid drops below the boiling pressure of the liquid, leading to the formation of small vapor-filled cavities within the liquid. At higher pressure, these cavities collapse and can create shock waves that can damage the container. Video in slow motion at 82.000 frames per second from them "The Slow Mo Guys".
- Designs on marble with water cutting Hydro-cutting machine precisely creates beautiful designs on marble. The cutting is achieved through a package of small diameter water (0,5 – 1,2 mm) and Pro-high pressure (about 3500-4.000 atmospheres).
- Carpet cleaning The thorough cleaning of a very dirty carpet. The water used probably cost more than the carpet itself.
- A wood floats in the sea A woman records a piece of wood floating on the surface of the water, on a beach in Mazatlán, Mexico. But a wave will reveal that it is actually a crocodile.
- Cleaning a swimming pool after Hurricane Ida A professional pool cleaner, was asked to clean a pool filled with algae and dirty water after Hurricane Ida in the United States.
- Washing under water Cleaning a propeller with water pressure under water. The diver uses a high-pressure pump to clean a boat propeller of sediment and seaweed.
- Cleaning a plastic chair with water under pressure A dirty plastic chair is cleaned with a water washer. The video is quite enjoyable.