When a molten metal is mixed with another substance, there are two mechanisms that can cause an alloy to form, called atom exchange and the interstitial mechanism.

When this discovery was followed up in 1870, on the neighbouring Santorin ( Thera ), by representatives of the French School at Athens, much pottery of a class now known immediately to precede the typical late Aegean ware, and many stone and metal objects, were found.

When the country was still part of the former Yugoslavia, joint ventures and cooperation played a large role here ( motor industry, metal processing, textile industry / contract processing work, steel and chemicals ).

When Bathory's Under the Sign of the Black Mark was released, the album was considered a death metal record.

When a metal wire is subjected to electric force applied on its opposite ends, these free electrons rush in the direction of the force, thus forming what we call an electric current.

When a metal wire is connected across the two terminals of a DC voltage source such as a battery, the source places an electric field across the conductor.

When they struck it they knocked many electrons out of the metal.

When metal ions are reduced from ionic solution, they form a pure metal surface on the cathode.

* When the metal atoms are cubic close packed, ( ccp ), then filling all of the octahedral interstices with carbon achieves 1: 1 stoichiometry with the rock salt structure.

When playing the rim of an okedō, however, it is important to hit only the outermost metal ring and not the actual rim of the drum body.

When used in art glass or studio glass glass is colored using closely guarded recipes that involve specific combinations of metal oxides, melting temperatures and ' cook ' times.

When Lindh arrived at Camp Rhino he was stripped and he was restrained to a stretcher, blindfolded and placed in a metal shipping container, which was procedure for dealing with a potentially dangerous detainee associated with a terrorist organization.

When submerged in water, hydrogen bubbles will almost unnoticeably begin to form on the surface of the metal, though if powdered it will react much more rapidly.

When considering the band structure and binding energy of a metal, it is necessary to take into account the positive potential caused by the specific arrangement of the ion cores – which is periodic in crystals.

When a metal ore is an ionic compound of that metal and a non-metal, the ore must usually be smelted — heated with a reducing agent — to extract the pure metal.

When pure Python code is not fast enough, time-critical functions can be rewritten in " closer to the metal " languages such as C, or by translating ( a dialect of ) Python code to C code using tools like Cython.

When air had become completely phlogisticated it would no longer serve to support combustion of any material, nor would a metal heated in it yield a calx ; nor could phlogisticated air support life, for the role of air in respiration was to remove the phlogiston from the body.

When Germain's correspondence with Gauss ceased, she took interest in a contest sponsored by the Paris Academy of Sciences concerning Ernst Chladni's experiments with vibrating metal plates.

When asked by one of the reporters if it was a good idea to hold this metal rod in the middle of a storm he replied that all was well.

When exposed to nitrogen clean titanium metal is covered with a titanium nitride layer.

When a beam of silver atoms was passed through a specially shaped magnetic field, the beam was split based on the direction of an atom's angular momentum, or spin.

When the atoms are relatively similar in size, the atom exchange method usually happens, where some of the atoms composing the metallic crystals are substituted with atoms of the other constituent.

When this happens, the carbon atoms are said to be in solution, or mixed with the iron, forming a single, homogeneous, crystalline phase called austenite.

When this happens the carbon atoms will no longer be soluble with the iron, and will be forced to precipitate out of solution, nucleating into the spaces between the crystals.

When rapidly cooled, a diffusionless ( martensite ) transformation occurs, in which the carbon atoms become trapped in solution.

When the excited atoms relax back into their ground state, a low-intensity glow is emitted, giving the technique its name.

When two monosaccharides undergo dehydration synthesis, water is produced, as two hydrogen atoms and one oxygen atom are lost from the two monosaccharides ' hydroxyl group.

When two distinct elements are chemically combined, with the atoms held together by chemical bonds, the result is termed a chemical compound.

When covalent bonds link long chains of atoms in large molecules, however ( as in polymers such as nylon ), or when covalent bonds extend in networks though solids that are not composed of discrete molecules ( such as diamond or quartz or the silicate minerals in many types of rock ) then the structures that result may be both strong and tough, at least in the direction oriented correctly with networks of covalent bonds.

When they struck atoms in the glass wall, they excited their orbital electrons to higher energy levels, causing them to fluoresce.

When the universe cooled enough, protons and electrons could form neutral atoms.

When particles in a beam are thrown against a foil made of a certain substance, the cross section is a hypothetical area measure around the target particles of the substance ( usually its atoms ) that represents a surface.

When stacking one of these layers on top of another, the atoms are not directly on top of one another — the first two layers are identical for hcp and fcc, and labelled AB.

When these crystals are exposed to radiation, the dysprosium atoms become excited and luminescent.

When a mathematician reasons from the statement " ABC is a triangle " to the statement " triangles exist ", she is not asserting that triangles are made up of atoms but rather that triangles exist within a particular mathematical model.

When the group of covalently bound atoms bears a net charge, the group is referred to more properly as a polyatomic ion or a complex ion.

When one reactant contains hydrogen atoms, a reaction can take place by exchanging protons in acid-base chemistry.

When sodium ( Na ) and chlorine ( Cl ) are combined, the sodium atoms each lose an electron, forming cations ( Na < sup >+</ sup >), and the chlorine atoms each gain an electron to form anions ( Cl < sup >−</ sup >).

When EMR interacts with single atoms and molecules, its behaviour depends on the amount of energy per quantum it carries.

When I show up he will know you are a good wife to have told him about it ''.

When the Know-nothings get control, it will read, All men are created equal except Negroes and foreigners and Catholics.

When the reactionary response is thus bolstered by an intellectual defense, the characteristics of that defense are explicable only in terms of the basic attitudes of unanalyzed reaction.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

She used to tell me, `` When I stand there and look at the flag blowing this way and that way, I have the wonderful, safe feeling that Americans are protected no matter which way the wind blows ''.

When we consider the disorganized state of the world community, and the legacy of predispositions adversely directed against all who are identified as Jews, it is obvious that the struggle for the minds and muscles of men needs to be prosecuted with increasing vigor and skill.

When these fields are surveyed together, important patterns of relationship emerge indicating a vast community of reciprocal influence, a continuity of thought and expression including many traditions, primarily literary, religious, and philosophical, but frequently including contact with the fine arts and even, to some extent, with science.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

When finally the two bedraggled men reach their friend's home, Voltaire's fears are once again aroused.

`` When are you to leave ''??

When the roof blocks are all in place, the final rows of wall blocks are mortared into position.

When the aid operations are reorganized the Peace Corps should remain a semi-autonomous, functional unit.

When the budget goes to trustees for approval it is the president's budget, to which his faith and credit are committed ; ;

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

When aircraft are no longer helpless on airfields, they are no longer vulnerable to Aj.

When more than two figures are separated by subtraction symbols the subtraction must be carried out from the left to right if the result is to be correct.

When they're on, the top edges are planed even with the sheer batten.

When painting, Mason's physical eyes are half-closed, while his mind's eye is wide open, and this circumstance accounts in part for the impression he wishes to convey.

When improvements are recommended in working conditions -- such as lighting, rest rooms, eating facilities, air-conditioning -- do you try to set a measure of their effectiveness on productivity??

When sufficiently accurate and complete measurements are available, it will be possible to set limits on the thermal and electrical characteristics of the surface and subsurface materials of the moon.

When some thirteen records of newly and recently born individuals are collated, little or no correlation between length and distribution can be detected.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??