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When the iron tip oxidises and burnt flux accumulates on it, solder no longer wets the tip, impeding heat transfer and making soldering difficult or impossible ; tips must be periodically cleaned in use.
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When and iron
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 an infected host cell is starved for various nutrients such as amino acids ( for example, tryptophan ), iron, or vitamins, this has a negative consequence for Chlamydiae since the organism is dependent on the host cell for these nutrients.
When oxygen binds to the iron complex, it causes the iron atom to move back toward the center of the plane of the porphyrin ring ( see moving diagram ).
When red cells reach the end of their life due to aging or defects, they are broken down in spleen, the hemoglobin molecule is broken up and the iron gets recycled.
When Bada performed the Miller-type experiment with the addition of iron and carbonate minerals, the products were rich in amino acids.
When the settlers brought iron, Native Americans switched to iron hoes and hatchets.
When all Jews were compelled to flee Alqosh in 1948, the iron keys to the tomb were handed to a Chaldean man by the name of Sami Jajouhana.
When impure ( cast ) iron is in contact with water, oxygen, or other strong oxidants, or acids, it rusts.
When used in larger quantity, spices can also contribute a substantial amount of minerals, including iron, magnesium, calcium, and many others, to the diet.
When enemies attempted to dig tunnels under walls for mining or entry into the city, the defenders used large bellows ( the type the Chinese commonly used in heating up a blast furnace for smelting cast iron ) to pump smoke into the tunnels in order to suffocate the intruders.
When iron is smelted from its ore by commercial processes, it contains more carbon than is desirable.
When in its molten state, tellurium is corrosive to copper, iron and stainless steel.
When Bessemer went to push them into the ladle, he found that they were steel shells: the hot air alone had converted the outsides of the iron pieces to steel.
When they gathered around a blanket on which pinole ( a ground corn flour ) had been placed for them, Johnson and his men opened fire on the Chihenne with rifles and a concealed cannon loaded with scrap iron, glass, and a length of chain ).
: When he wished to print, he took an iron frame and set it on the iron plate.
When hit, even iron armour was quite pierced through.
When the metal had cooled and hardened, the smaller ingots ( the pigs ) were simply broken from the much thinner runner ( the sow ), hence the name pig iron.
When the hotter sections of the discs reach extremely high temperatures ( 1200 – 1300 degrees Fahrenheit ), the carbon within the cast iron of the disc will react with the iron molecules to form a carbide known as cementite.
When rebuilt around 1831, this was replaced by a wrought iron backhead and throatplate, with a drum wrapper ( now missing ), presumed to be of copper, between them.
When and tip
When the `` dot '' and `` tip '' coincide, the classification used in this paper is `` Same schedule ''.
When I switched on the lights for her to come and get the check, I had the exact change plus a dollar tip.
When a tyrannosaur would have pulled back on a piece of meat, the force would tend to push the tip of tooth toward the front of the mouth and the anchored root would experience tension on the posterior side and compression from the front.
When hydrolysis catches up to the tip of the microtubule, it begins a rapid depolymerization and shrinkage.
When asked whether he felt Donaldson's role as an informer in Sinn Féin was significant, the IRA double agent using the pseudonym " Kevin Fulton " described Donaldson's role as a spy within Sinn Féin as " the tip of the iceberg ".
When a conducting tip is brought very near to the surface to be examined, a bias ( voltage difference ) applied between the two can allow electrons to tunnel through the vacuum between them.
When V is positive, electrons in the tip tunnel into empty states in the sample ; for a negative bias, electrons tunnel out of occupied states in the sample into the tip.
When a modern ski is tilted on to its edge, a gap is created between the ground and the middle of the ski ( under the binding ) as only the sides near the tip and the tail touch the snow.
When the mosquito first lands on a potential host, her mouthparts will be enclosed entirely in this sheath, and she will touch the tip of the labium to the skin in various places.
When hung for display, the tip points to the right.
When it rains, steam is said to spout from the tip of its tail.
When the electric field reaches a value in the order of 10 < sup > 9 </ sup > V / m, the atoms at the tip of the cusps spontaneously ionize and an ion jet is extracted by the electric field, while the electrons are rejected in the bulk of the liquid.
When Stone Age humans first took a sliver of flint to tip the spear, it was the first example of applying technology to improve the weapon.
When the next period of rain begins it may take no more than one or two drops to tip the lever.
When he came to this place at the southern tip of Lake Michigan in 1866, he founded the community that bears his name.
When not in use, the glass probe tip must be kept wet at all times to avoid the pH sensing membrane dehydration and the subsequent dysfunction of the electrode.
When a server has not adequately addressed issues a customer has with service, the patron may choose to speak with management to have the problems corrected before considering reducing the tip.
When his two great aunts invite Rowan and Nina to spend the summer with them in Owatannauk, Maine, a small ( fictional ) town on the tip of the state, Rowan anticipates a very boring summer with the two elderly women.
When the Crown realized that settlers from Virginia had already crossed the bay to begin settling the southern tip of the eastern shore, the grant was revised to include the eastern shore only as far south as a line drawn east from the Potomac River.
When tempering a double-edged sword with a taper along its length, the tip may reach the proper temperature before the shank does.
When present, they usually are seen on the tip of the penis.
When the dog is alert, the tip of the V should not extend past the outer corner of the eyes.
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