For more massive stars, electron degeneracy pressure will not keep the iron core from collapsing to very great density, leading to formation of a neutron star, black hole, or, speculatively, a quark star.

Sulfur, together with carbon and iron salts, is used to form iron polysulfides and produce amber glass ranging from yellowish to almost black.

The two most used black writing inks in history are carbon inks and iron gall inks.

Historically, manganese is named for various black minerals ( such as pyrolusite ) from the same region of Magnesia in Greece which gave names to similar-sounding magnesium, Mg, and magnetite, an ore of the element iron, Fe.

Boxes colors: arsenic is in brown, copper in red, tin in grey, iron in reddish brown, gold in yellow, silver in white and lead in black.

Boxes colors: arsenic is in brown, copper in red, tin in grey, iron in reddish brown, gold in yellow, silver in white and lead in black.

The first hues were red ( iron oxide, hematite, or red ochre ) and black ( manganese dioxide, pyrolusite ), though black from juniper or pine carbons has also been discovered.

The Kuru kingdom corresponds to the Black and Red Ware and Painted Grey Ware cultures and to the beginning of the Iron Age in South Asia, around 1000 BCE, as well as with the composition of the Atharvaveda, the first Vedic text to mention iron, as, literally " black metal.

White mobs, many of them organized around Irish athletic clubs, began pulling black people off trolley cars, attacking black businesses, and beating victims with baseball bats and iron bars.

Interior rust in old galvanized iron water pipes can result in brown and black water.

Stars with around ten or more times the mass of the Sun can explode in a supernova as their inert iron cores collapse into an extremely dense neutron star or black hole.

There was not yet any black iron.

At longer ranges, solid shot or the common shell — a hollow cast iron sphere filled with black powder — was used, although with more of a concussive than a fragmentation effect, as the pieces of the shell were very large and sparse in number.

Pyrite and amorphous iron sulfide along with carbon produce the black and purple coloration.

These are, the reduction in gun crime in Northern Ireland ( which led to guns coming from there to the criminal black market in England ); guns ( official issue or confiscated ) acquired by military personnel in Iraq and Afghanistan ; and guns coming from Eastern Europe after the fall of the iron curtain.

The two Bludgers are round, jet black balls, made of iron.

They also confirmed that the ink contained only trace amounts of iron, and that the black line remnants were on top of the yellow, indicating that they were not the remains of a penciled guide-line, as the British Museum staff had speculated.

One member of the team, Gregory Möller, also analyzed loose particles retrieved from the split down the middle of the map by a different method, finding that most of them were rich in titanium ( though a few black particles were rich in chromium and iron ).

At Pessinos in Phrygia, the mother goddess-identified by the Greeks as Cybele-took the form of an unshaped stone of black meteoric iron, and may have been associated with or identical to Agdistis, Pessinos ' mountain deity.

Initial products were colorants for industrial use, including red iron oxide pigments used in barn paint and carbon black chemicals used for making tires black and extending their useful lifespan.

The iron tube acted as a combustion chamber and contained well packed black powder propellant.

When an object falls into a black hole, any information about the shape of the object or distribution of charge on it is evenly distributed along the horizon of the black hole, and is lost to outside observers.

Ultrasound representation of Urinary bladder ( black butterfly-like shape ) and hyperplastic prostate.

In September 1692, Sibbald found a blue whale that had stranded in the Firth of Forth — a male 78-feet-long — which had " black, horny plates " and " two large apertures approaching a pyramid in shape ".

Typical aerodynamic teardrop shape, assuming a viscous medium passing from left to right, the diagram shows the pressure distribution as the thickness of the black line and shows the velocity in the boundary layer as the violet triangles.

The first player places 3 stones ( 2 black 1 white, if black goes first ) on the board, the second player has the choice to take black / white or place 2 more stones to change the shape and let the first player choose color.

* Postmodernism is the new black: How the shape of modern retailing was both predicted and influenced by some unlikely seers (< CITE > The Economist </ CITE > 19 December 2006 )

* Flavor Heart: very large, black with a heart shape, and yellow flesh

The pitot is the pencil point shape and the vane is black.

Like Frantz Fanon, Biko originally studied medicine, and, like Fanon, Biko developed an intense concern for the development of black consciousness as a solution to the existential struggles which shape existence, both as a human and as an African ( see Négritude ).

The right hand bluish shape is the image formed by the blue-doppler shifted light arriving at the observer — who is located at the apex of the black Cherenkov lines — from the sphere as it approaches.

Image: UltrasoundBPH. jpg | Urinary bladder ( black butterfly-like shape ) and hyperplastic prostate ( BPH ) visualized by Medical ultrasonography technique.

Nicks ' trademark tambourine since the early 1980s is in the shape of a black half-moon.

Wien's displacement law states that the wavelength distribution of thermal radiation from a black body at any temperature has essentially the same shape as the distribution at any other temperature, except that each wavelength is displaced on the graph.

Because the spectrum from Planck's law of black body radiation takes a different shape in the frequency domain from that of the wavelength domain, the frequency location of the peak emission does not correspond to the peak wavelength using the simple relationship between frequency, wavelength, and the speed of light.

Sometimes this is the result of shape shifting on part of the fairy, as in the case of the selkie ( seal people ); others, like the kelpie and various black dogs, appear to stay more constant in form.

The fruit is a silique that opens at maturity through dehiscence to reveal brown or black seeds that are small and round in shape.

Urinary bladder ( black butterfly-like shape ) and hyperplastic prostate ( BPH ) visualized by Medical ultrasonography technique

The program displayed a two dimensional shape ( a “ biomorph ”) made up of straight black lines, the length, position, and angle of which were defined by a simple set of rules and instructions ( analogous to a genome ).

Also, the FSN logo on the far right is now in a black oval-like shape with the region in white.

Urinary bladder ( black butterfly-like shape ) and hyperplastic prostate ( BPH ) visualized by sonography

Verreaux's Eagle ( A. verreauxii ) are most similar in size and body shape to the Golden but are almost entirely black ( except for some whitish color on the wing primary ) in plumage and are not known to co-occur with the Golden Eagle in Africa.

Urinary bladder ( black butterfly-like shape ) and hyperplastic prostate ( BPH ) visualized by medical ultrasonography technique