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(10) | 11/04/2018 | Translate: A simple example of how does the process of natural selection.
Physics lesson with a knife and a potato A simple demonstration of inertia, using a knife and a potato. From Dr.. Tatiana Erukhimova, Department of Physics & Astronomy, University of Texas.- The Foucault's pendulum The pendulum of Foucault which took its name from the French natural Léon Foucault, is a simple device created in 1851 to demonstrate the rotation of the Earth. Despite the fact that the Earth's rotation was a known fact that season, the introduction of the pendulum of Foucault was a proof of the rotation with a simple and understandable way. In most, the Foucault's pendulum became known from the homonymous novel by Umberto Eco.
- Just magic with paper clips One of the activities of mathematics professor Tadashi Tokieda is inventing, collecting and studying various games - objects from everyday life that we can find in minutes, But if used imaginatively reveal behaviours so amazing that can preoccupy the scientists for weeks. In this video you will see the US Tokieda demonstrates a simple magic trick that is easy to execute everyone at home, and is a fun example of such "Games".
- The USB stick that destroys any computer A Russian electronic with the nickname "Dark Purple" He built a USB stick that can be "Bake" the motherboard of a computer in a few seconds. Here we see the stick connects to a laptop, and a few seconds later he is disabled and will not open again. The function of this murderous USB stick is relatively simple. It is equipped with several capacitors that play the role of accumulators, and a DC transformer. When it is connected, the stick takes a 5V voltage from the computer port. When the capacitors filled, send back to port for a fraction of a second voltage 220 Volt directly destroys the motherboard. This USB stick besides computers, can burn any device with USB port, like for example a tv or game console.
- What is the elusive Higgs; The theoretical physicist John Ellis explains in a simple way what exactly is the elusive Higgs, before the press conference on the results of research at CERN.
- The fountain chain The chain-fountain phenomenon, also known as Newton's beads or the Mold effect, is a natural phenomenon observed with a chain placed inside a jar, when one end of the chain is pulled from the jar and allowed to fall under the influence of gravity. This process creates a self-sustaining chain flow that rises above the edge and descends to the ground below it, as if drawn from the jar by an invisible siphon.
- Bond strength in nailing two pieces of wood What is the best method of joining two pieces of wood with nails to give us the strongest connection; The answer is given by a simple test.
- The strange characteristics of an electric car Η Cadillac Lyriq, Cadillac's first electric car, it has many automations that one might say are not that necessary. For example, to open the glove box you have to navigate through a touchscreen menu, before pressing the button to open electronically.
- Painting flowers A professional painter shows us her "simple" technique with which he paints some flowers.
- Weather presenter discovers he has a touch screen On the morning of Thursday, August 4, 2022, live on the American channel ABC 7 Chicago, weatherman Greg Dutra was surprised to see the image move when his hand touched the screen he uses every day to present the weather forecast. He had just found out, that the screen is touch sensitive, allowing him to pan the map or zoom with a simple finger tap. His reaction greatly amused the show's co-hosts.
- Kush Kash: A musical instrument from Ghana Cous Kash or Kasaka, is a very simple musical instrument from west Africa. It is a percussion instrument consisting of two small gourds (from the Oncoba spinosa tree) full of beans - essentially two small maracas connected by a string. One pumpkin is held in the hand and the other is quickly rotated from side to side around the hand, making a sound on impact.
- How to calm a crying child How to calm a crying child; Is simple: just focus his attention on something else by giving him an object. Here, a mother gives a spoon to her child to calm him down. Unfortunately, the method didn't work this time, since the little one will use the spoon to hit his brother on the head.
- How to fold a fitted sheet A simple method to fold a fitted sheet.
- Making a 3D drawing A simple 3D drawing using a pencil and a ruler.
- Rail welding Although in the past the rails had to have a gap between them to cope with temperature expansion/contraction, this technique is no longer applied to high-speed trains. The rails are welded together for several kilometers, and then heated to a high temperature to fully expand. Rail fasteners use very high clamping force, and so the contraction is much less. A second technique is the expansion joint, which may be different: it is no longer a mere gap, but a smooth joint where the two rails are side by side and when they grow or shrink in length they can slide next to each other.