The Earth's core consists mainly of a sphere of
liquid iron at temperatures above 4000 degrees and pressures of more than 1.3 million atmospheres.
Alfè and his colleagues used supercomputers to carry out a «first principles» calculation of heat flow in
liquid iron at Earth's core.
Not exact matches
In the meantime, I strongly recommend that for your
iron supplement, you take Floravital
liquid iron and herb supplement (found
at any natural food store).
Two years ago, a team of scientists from two British universities discovered that
liquid iron,
at the temperatures and pressures found in the outer core, conducts far more heat into the mantle than anyone had thought possible.
The discovery is vexing: If
liquid iron conducts heat into the mantle
at such a high rate, there wouldn't be enough heat left in the outer core to churn its ocean of
liquid iron.
The Outer Core Made of molten
iron, nickel, and other ingredients yet to be determined, the churning
liquid outer core may have the viscosity of water, streaming
at possibly one to several miles per week with the turbulence of a gargantuan, slow - moving washing machine.
It is only
at the very centre of the Earth, where pressure and temperature rise even higher, that the
liquid iron solidifies.
Below the mantle is the outer core, composed of
liquid, molten
iron and nickel, which envelopes an inner core of solid
iron at the center of the planet.
Mercury's peculiar magnetic field provides evidence that
iron turns from a
liquid to a solid
at the core's outer boundary, say the scientists, whose research currently appears online in the journal Geophysical Research Letters and will be published in an upcoming print edition.
Together with Eric Blackman, an astrophysicist
at the University of Rochester, and Michael Watkeys, a geologist
at the University of KwaZulu - Natal in South Africa, Tarduno hypothesizes that the region — which is referred to as a Large Low Shear Velocity Province (LLSVP)-- affects the direction of the churning
liquid iron that generates Earth's magnetic field.
Within Earth's core,
iron turns from a
liquid to a solid
at the inner boundary of the planet's
liquid outer core; this results in a solid inner part and
liquid outer part.
To mimic conditions
at Earth's Core, scientists cranked up the heat and pressure, then used synchrotron X-rays to gauge when
iron turned from solid to
liquid.
They used an
iron - bearing
liquid which they released in small drops
at regular intervals
at the centre of a dish of silicone oil.
The new data should help scientists better model the movement of
liquid iron in the outer core, which gives rise to Earth's magnetic field, says Duncan Agnew, a geophysicist
at Scripps Institution of Oceanography in San Diego, California.
It is widely accepted that the Earth's inner core formed about a billion years ago when a solid, super-hot
iron nugget spontaneously began to crystallize inside a 4,200 - mile - wide ball of
liquid metal
at the planet's center.
By looking in detail
at the seismic record, you can deduce that Earth has a
liquid outer core and a solid inner core, and that both are mostly
iron.
If Mercury's core material condensed from primordial matter
at pressures of one atmosphere or more,
iron would condense as a
liquid capable of dissolving copious amounts of hydrogen.
In that case, up your intake of
iron - rich plant sources, cook in cast
iron pots (especially acidic solutions like tomato sauce, orange juice), avoid drinking any type of tea or coffee
at meals, take citrus or vitamin C with
iron - rich meals, or consider a modest amount of a
liquid - based
iron elixir (e.g. a couple drops per day).