Chains of atoms move at lightning speed inside metals

A phenomenon that has previously been seen when researchers simulate the properties of planet cores at extreme pressures has now also been observed in pure titanium at atmospheric pressure. Chains of atoms dash around at ...

Researchers simulate processes prevailing in early magma oceans

The reason why the Earth's atmosphere has contained so much oxygen since about two billion years ago compared to the atmospheres of other known planets has for a long time remained a mystery. Researchers at the Bavarian Research ...

ExoMars rover ready for environment testing

The Rosalind Franklin ExoMars rover has completed its construction activities in the UK and will now depart to France for testing under the conditions of the Red Planet's environment.

Highly anticipated nuclear experiment underway

Neutron stars were recently in the news because the gravitational wave observatory, LIGO, detected a neutron star merger. Neutron stars are very interesting objects. A teaspoon of neutron star matter is so dense it would ...

Silica aerogel could make Mars habitable

People have long dreamed of re-shaping the Martian climate to make it livable for humans. Carl Sagan was the first outside of the realm of science fiction to propose terraforming. In a 1971 paper, Sagan suggested that vaporizing ...

High pressure creates new neighbours for beryllium

The rare element beryllium is mainly known for being a component of emeralds, aquamarines, and other precious stones. However, in Nature Communications, an international team of scientists from the University of Bayreuth ...

Ice-squeezed aquifers might create marsquakes

As the Mars InSight lander begins listening to the interior of Mars, some scientists are already proposing that some marsquakes could be signals of groundwater beneath the frozen surface of the Red Planet.

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Atmospheric pressure

Atmospheric pressure is sometimes defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 65.5 newtons (14.7 lbf). The weight of a 1 m2 (11 sq ft) column of air would be about 101 kN (10.3 tf).

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