Chem, also noting that the core of the Earth is at more than 5000 K, while the melting temperature of iron at atmospheric pressure is 1800K. At this temperature and pressure iron is not behaving as a normal solid. Giovanni
On Mon, Jan 21, 2013 at 3:24 PM, Giovanni Santostasi <gsantost...@gmail.com>wrote: > There is a outer core that is molten and the inner core that is solid. > Giovanni > > > > On Mon, Jan 21, 2013 at 3:14 PM, ChemE Stewart <cheme...@gmail.com> wrote: > >> Funny, >> >> Last I read they think the inner core is solid... >> >> The *inner core* of the Earth <http://en.wikipedia.org/wiki/Earth>, its >> innermost part, is a primarily solid <http://en.wikipedia.org/wiki/Solid> >> ball <http://en.wikipedia.org/wiki/Ball_%28mathematics%29> with a >> radius of about 1,220 km (760 mi), according to seismological >> studies<http://en.wikipedia.org/wiki/Seismology> >> .[1] >> <http://en.wikipedia.org/wiki/Inner_core#cite_note-1>[2]<http://en.wikipedia.org/wiki/Inner_core#cite_note-2> >> (This >> is about 70% of the length of the Moon<http://en.wikipedia.org/wiki/Moon>'s >> radius.) It is believed to consist primarily of an >> iron<http://en.wikipedia.org/wiki/Iron> >> –nickel <http://en.wikipedia.org/wiki/Nickel> >> alloy<http://en.wikipedia.org/wiki/Alloy>, >> and to be about the same temperature as the surface of the >> Sun<http://en.wikipedia.org/wiki/Sun>: >> approximately 5700 K <http://en.wikipedia.org/wiki/Kelvin>(5430 °C). >> >> So I guess we are both bucking the trend... You say solid, I say black >> hole >> >> >> >> >> On Mon, Jan 21, 2013 at 4:08 PM, Giovanni Santostasi < >> gsantost...@gmail.com> wrote: >> >>> Iron at the core of the earth is a plasma, so the hydrogen and helium at >>> the core of the sun. >>> Giovanni >>> >>> >>> >>> On Mon, Jan 21, 2013 at 3:07 PM, Giovanni Santostasi < >>> gsantost...@gmail.com> wrote: >>> >>>> These are plasmas, the electrons are taken away from the atoms and they >>>> are mixed with bare nuclei. You can compress a plasma to degenerate levels >>>> when quantum mechanics exclusion principle takes over. These densities are >>>> even more enormous. >>>> Giovanni >>>> >>>> >>>> >>>> On Mon, Jan 21, 2013 at 3:04 PM, ChemE Stewart <cheme...@gmail.com>wrote: >>>> >>>>> Last time I checked most solids and liquids were >>>>> mostly "non-compressible", at least in our macro world. Liquid Water >>>>> density changes only 4% over a wide range >>>>> >>>>> >>>>> On Monday, January 21, 2013, Giovanni Santostasi wrote: >>>>> >>>>>> In fact, it is mostly hydrogen and helium. >>>>>> This to show that you can have iron at the core of earth with higher >>>>>> density that what iron has at atmospheric pressure. The density is >>>>>> determined by the pressure and temperature not just the type of material. >>>>>> When we quote densities of materials most often we mean at atmospheric >>>>>> pressure. >>>>>> Giovanni >>>>>> >>>>>> >>>>>> On Mon, Jan 21, 2013 at 2:57 PM, ChemE Stewart <cheme...@gmail.com>wrote: >>>>>> >>>>>> Works for me, I never said it was iron >>>>>> >>>>>> >>>>>> On Monday, January 21, 2013, Giovanni Santostasi wrote: >>>>>> >>>>>> The sun core has a density 20 times higher than iron at atmospheric >>>>>> pressure. >>>>>> Giovanni >>>>>> >>>>>> >>>>>> On Mon, Jan 21, 2013 at 2:54 PM, ChemE Stewart <cheme...@gmail.com>wrote: >>>>>> >>>>>> I have not calculated it yet, but I think it is a black hole with >>>>>> enough entropic gravitational pull to trigger fusion around it. >>>>>> >>>>>> Could you run that calc for me? >>>>>> >>>>>> >>>>>> On Monday, January 21, 2013, Giovanni Santostasi wrote: >>>>>> >>>>>> Chem, what is the density of the core of the sun? >>>>>> Plasma can be squeezed to ultra high density under high pressure. >>>>>> Giovanni >>>>>> >>>>>> On Mon, Jan 21, 2013 at 2:47 PM, ChemE Stewart <cheme...@gmail.com>wrote: >>>>>> >>>>>> I was thinking a plasma was less dense. Maybe you meant a Bose >>>>>> Einstein condensate or something similar? >>>>>> >>>>>> *Plasma* is similar to a gas, in which a certain proportion of its >>>>>> particles are ionized. Gases contain molecules bonded with molecular >>>>>> bonds.In stars or in case of high temperatures, the molecular bonds of >>>>>> gases are dissociated & then due to high temperature it suffers further >>>>>> heating <http://wiki.answers.com/Q/Is_plasma_more_dense_than_gas#> & >>>>>> finally forms so called plasma. They have density about [1 part./meter >>>>>> cube >>>>>> -1032 part./meter >>>>>> cube<http://wiki.answers.com/Q/Is_plasma_more_dense_than_gas#> >>>>>> ]. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Mon, Jan 21, 2013 at 3:40 PM, Giovanni Santostasi < >>>>>> gsantost...@gmail.com> wrote: >>>>>> >>>>>> It is denser because the iron is in a plasma form under a lot of >>>>>> pressure, so it can be compacted. >>>>>> Giovanni >>>>>> >>>>>> >>>>>> >>>>>> On Mon, Jan 21, 2013 at 2:26 PM, ChemE Stewart <cheme...@gmail.com>wrote: >>>>>> >>>>>> From You >>>>>> >>>>>> "Gravity was dominant force. People do simulations of this stuff and >>>>>> they work" >>>>>> >>>>>> >>>> >>> >> >
