Published December 13, 2016
What is the "the Maxwell's demon"? Why did he excites the minds of great scientists? It is easy to explain. Scientists are looking for processes that would allow heat to pass from the body less heated to a more heated bodies. But we know that heat can only move from hot to cold bodies. This is called the second law of thermodynamics...
Published February 26, 2017
The refrigerator is the most economical and environmentally friendly oven (for example, for home heating). Refrigerator, better non-motorized (it is called - absorption refrigerator). Here is how to make sure that the refrigerator can operate as a furnace. The appliance must be split: the motor, the compressor and the heat exchanger - one node, and an evaporator - the other connected to the first long copper tubes...
Published February 26, 2017
Experimentally can check how the light rays change direction at the transition, such as from air to water. Take the opaque metal or porcelain mug. At its bottom, place a stack of coins 5-6. Without taking his eyes off the coins, pushes your head until the edge of the mug do not close them by you. Without changing the position of the head, slowly pour in a cup of water. Rays of light will enter the eye and coins will become visible again...
Published February 26, 2017
Who has the mass more - teapot with hot water or with the same amount of cold, from a fixed or a rotating flywheel? Yes, the mass of hot teapot more than a cold teapot. Yes, the mass of the rotating flywheel with energy is more not rotating flywheel . The extra mass - it is... the energy contained in the hot kettle and a rotating flywheel! How much weighs energy?..
Published February 26, 2017
The superconductivity is associated with the name of the Dutch scientist Geike Kamerlingh Onnes. In technology, superconductivity make a real revolution. In the late 19th - early 20th centuries scientists were able to convert into liquid all gases and even a champion among them - helium. Thereafter, superconductivity was discovered. The boiling point of helium only 4,2 degrees Celsius above absolute zero equal to minus 273,16 degrees Celsius...
Published February 26, 2017
Ball lightning is the mysterious and inexplicable phenomenon, the nature of which is still unclear. A rare phenomenon that is familiar to mankind for thousands of years, is still not solved science. But the ball lightning - it is such a phenomenon. It behaves unpredictably. It passes freely through the glass, then it walks through the air like the wind, and against it, it flies into the room from an AC outlet...
