Aurora Borealis – arise when the charged particles from the Sun (the so-called solar wind) hit the Earth’s magnetic field. Along its lines are directed to the poles, where they collide with molecules of air. There was a belief that between fairy tales you should put in the history that polar lights sometimes made sounds, even “whispered” – until the case was investigated by scientists from the University of Aalto in Finland. The truth is that when the nights are cold and silent, auroras create rustlings and cracks. Audible for hundreds of kilometers. The reason is the so-called inversion layer. It arises when it is colder near the surface of the planet than at higher levels of the atmosphere. It causes that negatively charged particles from the Sun are trapped in the cold zone. If their accumulation exceeds the critical point. By reacting with positive ions in the atmosphere and causing discharges, rustling and crackling.
Interior heating – Heat from battery or pump
Interior heating – The car’s engine can be started remotely not only in the BMW 7 Series, where the key allows you to control the car on the touch screen. But also in Swedish Volvo produced for a cool climate. Pre-heating the cabin and cooling the windows will be easier in electric cars. At Nissan Leaf, or the latest Mercedes-Benz EQC, you do not need to run the engine for this purpose. Mercedes does not take energy to ventilate directly from the battery. The Germans have used a modern heat pump to reduce energy consumption.
Technological metals – Term introduced in 2007
Technological metals – A concept that is relatively new, in contrast to the actual use of metals in science and industry. The date in 2007 was introduced by American chemist and physicist Jack Lifton. Since then, it is often used in industry. Generally, you can say that the tech. metals are basically precious metals and those that are necessary for the production of hi-tech devices and engineering systems. This category includes:
- commercial production of miniature electronic devices li>
- advanced military systems li>
- generating electricity using alternative sources, for example solar panels or wind turbines li>
- electricity storage using batteries and cells. li>
There are of course a lot of other uses of these elements. Almost all technological metals are a by-product of the treatment of basic metals (except for precious and lithium).
Flying police – Projects police cars
Flying police – Projects police cars entered the competition, which was held at the Motor Show in LA, consist of:
- BMW Group Designworks USA – E-Patrol – Double cruiser equipped with 3 small unmanned drones. E–Patrol will recover electricity from sheet by hot blazing sun tarmac, the car will be prosecuted and detained electromagnetic pulse.
- General Motors – Volt Squad – a 3 electric vehicles: Observe – used for observation and control. Pursue – to chase, and Engage the transportation of detainees delinquents.
- Subaru – SHARC (Subaru Highway Automated Response Concept) – which won the competition for LA Design Challenge – highway patrol vehicle itself has some interesting technical solutions:
– thin organic foam-filled tires instead of air
– the suspension is, however, electro-mechanical, with a special material IPMC (Ionic Polymer Metal Composite) enabling, depending on the applied voltage embracing different shapes
– with electrical energy wheels can also be deflected vertically.
Energy from sugar – Bio-Battery
Energy from sugar – A team of researchers from the Technical University of Virginia (the so-called. Virginia Tech) was inspired by nature and last year presented a draft of a battery that uses sugar to produce electricity.
The energy density of sugar is much higher than conventional lithium-ion batteries,
– He pointed out one of the advantages of the invention, research manager Y.H. Percival Zhang, an engineer biological systems at Virginia Tech. Bio battery offers an energy density of about 596 Ah / kg (ampere-hours per kilogram), while the typical lithium-ion battery has a density of only 42 Ah / kg.
Church tower protruding from water
Church tower protruding from water – The Lake Reschensee in South Tyrol (Italy) waiting an unusual sight: a protruding from the water Church tower. Only that was from the village of Alt-Graun. In the 50’s of the last century energy company decided to create there a reservoir for electricity and water. Alt–Graun residents were displaced, and the valley around the village – was poured. Today, almost nothing after it has been – apart from protruding from the water tower of the ancient parish church of St. Catherine.
Conductive metals – Standard on properties of silver
Conductive metals – Standard on properties of silver – Conductor causes little resistance to the flow of electric current or heat, which means that the load can move freely. Electrically conductive metals, usually also conduct heat. In selecting the most-conductor metal is silver, copper and gold. Standard conductivity of metals is based on the properties of silver, which is the best conductor of all pure metals. On a scale from 0 to 100, where 100 is the best conductivity, silver received 100. On the other hand, gold considered to be an excellent conductor, received only 76 points.