There is high temperature inside our planet and the reason is not known yet. A common belief that the Earth`s interior is heated by radioactive elements is now doubted of. Professor Felix Letnikov from Irkutsk Institute of the Earth`s Crust have proposed an idea that the heat is formed in the outer core because of friction between its layers.
Different geophysical data confirm that there is a heat source inside the Earth. In the mantle there are zones with low viscosity, which correspond to molten substance. However, melting rocks requires a lot of energy - so, the question about a source of the energy arises. According to current information, the core consists of two parts: a liquid outer part and a solid inner part. The outer core begins at the depth of 2900 km and is 2346 km thick; it holds 31% of the Earth`s mass. It is pressed between the inner core and the mantle, and because of the Earth`s axial rotation there is friction and heat formation between these two matters. Still, that is not the main heat source. In the outer core at different depths there are different temperature, pressure, viscosity and density, and this results in stratification. Try to spin a tin with condensed milk stored for some time on a shelf. Inside the milk, layers will rub against each other and the tin`s sides. And the fact that friction causes heat is well-known.
According to Letnikov`s theory, heat explosions happen because sometimes heat does not go away to the mantle. In such situation the core contents is of a big role. It includes iron with some nickel and many gases - hydrogen, sulphur and carbon. When explosion happens, a part of the gases mixture detaches and flows away into the mantle. This process is thought to be the cause of most of the abyssal processes.
Tatiana Pitchugina | alfa
Predicting unpredictability: Information theory offers new way to read ice cores
07.12.2016 | Santa Fe Institute
Sea ice hit record lows in November
07.12.2016 | University of Colorado at Boulder
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
08.12.2016 | Life Sciences
08.12.2016 | Physics and Astronomy
08.12.2016 | Materials Sciences