Word Finder - vacuum

definition

A region of space that contains no matter.

definition

(plural only "vacuums") A vacuum cleaner.

definition

The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, such as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.

example

a vacuum of 26 inches of mercury, or 13 pounds per square inch

definition

A spacetime having tensors of zero magnitude

definition

To clean (something) with a vacuum cleaner.

definition

To use a vacuum cleaner.

definition

To optimise a database or database table by physically removing deleted tuples.

The liquid is then evaporated under a vacuum of 27 to 28 in.

There is no such thing really as a vacuum, any more than there are atoms or ultimate indivisible particles.

Her English vocabulary was growing a word at a time—mostly terms like dust, vacuum, linens, dishes and other domestic terminologies.

Evaporation and subsequent distillation under a high vacuum gives crude glycerin.

The exhaust steam passing from the engine through the blastpipe and the chimney produces a diminution of pressure, or partial vacuum, in the smoke-box roughly proportional to the weight of steam discharged per unit of time.

The steam is introduced into the pipes at about the pressure of the atmosphere, and is sucked through the system by means of a vacuum pump, which at the same operation frees the pipes from air and from condensation water.

Open the fabric vacuum bag and check for blockages inside the tube.

For the production of high vacua, see Vacuum Tube; Liquid Gases.

If you notice any debris, remove it from the vacuum.

Thus, supposing that moo lb of coal were required to work a single vacuum pan, evaporating, say, 6000 lb of water in a given time, then 500 lb of coal would be required for a double-effect apparatus to do the same work, 333 lb for a triple effect, 250 for a quadruple effect, and 200 lb for a quintuple effect.

On other estates the second sugars, or sugars produced from boiling molasses alone, are not purged to dryness, but when sufficiently separated from their mother-liquor are mixed with the defecated juice, thereby increasing its saccharine richness, and after being converted into syrup in the usual manner are treated in the vacuum pan as first sugars, which in fact they really are.

You can often vacuum underneath furniture without switching to special attachments when you use a canister vacuum.

The Extreme Power Wet/Dry unit is a cordless hand held vacuum that works on both wet and dry surfaces.

Although electricity travels fast, its speed is still finite and over a wire it is slower than in a vacuum.

Vacuum the floor with a soft bristle attachment to remove dust and dirt from between planks.

If the vacuum jacket is silvered inside, radiation also is reduced to such an extent that, if the vacuum is really good, the external ice bath may be dispensed with for the majority of purposes.

The Heat Loss Can Be Reduced To A Minimum By Enclosing The Flow Tube In A Hermetically Sealed Glass Vacuum Jacket.

The Outside Of The Vacuum Jacket Was Immersed In A Water Jacket At A Steady Temperature Equal To That Of The Inflowing Mercury.

C. Rntgen of Munich made in 1896 his remarkable discovery of the so-called X or Rntgen rays, a class of radiation produced by the impact of the cathode particles against an impervious metallic screen or anticathode placed in the vacuum tube.

The study of radium and radioactivity led before long to the further remarkable knowledge that these so-called radioactive materials project into surrounding space particles or corpuscles, some of which are identical with those projected from the cathode in a high vacuum tube, together with others of a different nature.

Three oxides of barium are known, namely, the monoxide, BaO, the dioxide, Ba02, and a suboxide, obtained by heating Ba0 with magnesium in a vacuum to 110o (Guntz, loc. cit., 1906, p. 359).

When two pieces of flat glass are pressed together under mercury with moderate force they cohere, the mercury leaving the narrow crevasses, even although the alternative is a vacuum.

He was the first to use the vacuum tube with the capillary part now called a Geissler's tube, by means of which the luminous intensity of feeble electric discharges was raised sufficiently to allow of spectroscopic investigation.

It remains colourless in vacuum tubes in the dark, but on exposure it rapidly turns yellow.

Lampadius, however, showed that there was no phosphorescence in a Torricellian vacuum; and other experimenters proved that oxygen was essential to the process.

When heated in a vacuum to 530 it sublimes, and on condensation forms microscopic needles.

The acid may be prepared by evaporating in a vacuum the solution obtained by decomposing the barium salt with the equivalent amount of sulphuric acid.

Paschen in 1896 identified an unmistakable oxygen triplet in the infra-red, which is shown terrestrially only in the vacuum tube, where the spectrum is very different from that of atmospheric absorptions.

In the upper part there is consequently a tendency to the formation of a vacuum, and some of the impure sub-soil water near the higher leakages is sucked into the mains, to be mixed with the supply when next turned on.

Lead can be used for the purpose only when the boiling-point of the acid is reduced by means of a vacuum - a plan which has not met with much success.

The new Kessler furnace is a very ingenious apparatus, in which the fire from a gas-producer travels over the sulphuric acid contained in a trough made of Volvic lava, and surmounted by a number of perforated plates, over which fresh acid is constantly running down; the temperature is kept down by the production of a partial vacuum, which greatly promotes the volatilization of the water, whilst retarding that of the acid.

Moreover, by putting the retorts under a slight vacuum, the amount of gas produced is increased by about 12%, and is of better quality, owing to its leaving the heated retort more quickly.

By evaporating a solution containing free sulphuric acid in a vacuum, the hepta-hydrated salt first separates, then the penta-, and then a tetra-hydrate, FeSO44H2O, isomorphous with manganese sulphate.

The solution absorbs nitric oxide to form a dark brown solution, which loses the gas on heating or by placing in a vacuum.

Ferrous nitrate, Fe(NO3)2.6H2O, is a very unstable salt, and is obtained by mixing solutions of ferrous sulphate and barium nitrate, filtering, and crystallizing in a vacuum over sulphuric acid.

The discovery of the principle of the barometer which has perpetuated his fame ("Torricellian tube" "Torricellian vacuum") was made in 1643.

The earliest machine of this kind appears to have been made in 1 755 by Dr. William Cullen, who produced the vacuum by means of a pump alone.

Windhausen patented a vacuum machine for producing ice in large quantities, and in 1881 one of these machines, said to be capable of making about 12 tons of ice per day, was put to work in London.

At the present time vacuum machines are only employed for domestic purposes.

Fleuss consists of a vacuum pump capable of reducing the air pressure to a fraction of a millimetre, the suction pipe of which is connected first with a vessel containing sulphuric acid, and second with the vessel containing the water to be frozen.

Braun devised a form of cathode ray tube, consisting of a vacuum tube having a narrow tubular portion and a bulbous end.

Her English vocabulary was growing a word at a time—mostly terms like dust, vacuum, linens, dishes and other domestic terminologies.

They had six legs with little pads for feet instead of toes and claws, a delicate snout not quite the length of an anteater's lined with fine hairs and tiny teeth used to vacuum up mold, dust, and dirt that was its main food source, and an odd habit of climbing walls with hidden suckers in its padded feet.

The last sound to reach his ears as he dropped off to sleep was the hum of the vacuum cleaner competing with the twang of Merle Haggard on the disc player.

The Heisenberg uncertainty principle in quantum mechanics implies that vacuum fluctuations are present in every quantum theory.

In the quantum theory, matter which is in a false vacuum may "tunnel" to its true vacuum state.

The profile of cross-reaction with wheat germ agglutinin, used here as a general carbohydrate reagent, is shown in vacuum blots.

You should provide a small dump hose, to maintain airflow for cooling the vacuum motor.

Vacuum brazing Consultants Ltd. is a leading U.K. supplier of vacuum grades of brazing alloys.

Electric current ampere A The current which produces a specified force between two parallel wires which are 1 meter apart in a vacuum.