The cleaner air means less time spent pushing a vacuum, fewer trips to the dry cleaners, lighter loads for the washing machine.

Below him, as if at the end of some remote tunnel, he heard the humming of a vacuum cleaner.

Too early for a vacuum cleaner, but probably Sam wanted the whole house in order before he came downstairs.

Examples include Opabinia, with five eyes and a snout like a vacuum cleaner hose and Hallucigenia, which was originally reconstructed upside down, walking on bilaterally symmetrical spines.

In the case of a vacuum cleaner, these ports would be the three metal prongs in the plug.

Each port has a name, and in continuing the vacuum cleaner example, they might be " Neutral ", " Live " and " Ground ".

The creatures co-exist in Teletubbyland ( the name of their home environment ) with a number of odd contraptions such as Nuu-Nuu, the group's anthropomorphic blue vacuum cleaner with the tendency to suck up the Teletubbies ' possessions and the voice trumpets, devices resembling periscopes that rise from the ground and interact with the Teletubbies, serving as either supervisors for the beings who often arise to engage in games with them.

Noo-Noo seems to be both the Teletubbies ' guardian and housekeeper, due to its resemblance to a vacuum cleaner, which is its principal purpose in the house.

For example, a typical vacuum cleaner produces enough suction to reduce air pressure by around 20 %.

* August 30 – Hubert Cecil Booth patents an electric vacuum cleaner in the United Kingdom.

Canister vacuum cleaner for home use.

French train vacuum cleaner.

Closeup of an early hand-pumped vacuum cleaner, date unknown.

A vacuum cleaner is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors, and optionally from other surfaces as well.

A hand-powered pneumatic vacuum cleaner, circa 1910.

Early electric vacuum cleaner by Electric Suction Sweeper Company, circa 1908

The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners.

Daniel Hess of West Union, Iowa, invented a vacuum cleaner in 1860, calling it a carpet sweeper instead of a vacuum cleaner.

A practical method for investigating neutrino oscillations was first suggested by Bruno Pontecorvo in 1957 using an analogy with kaon oscillations ; over the subsequent 10 years he developed the mathematical formalism and the modern formulation of vacuum oscillations.

This force is used in the formal definition of the ampere, which states that it is " the constant current that will produce an attractive force of 2 × 10 < sup >– 7 </ sup > newton per metre of length between two straight, parallel conductors of infinite length and negligible circular cross section placed one metre apart in a vacuum ".

Each gate consisted of one inverting vacuum tube amplifier, preceded by a resistor divider input network that defined the logical function.

It weighed about 455 grams or one pound, had a vacuum fluorescent display, rechargeable NiCad batteries, and initially sold for $ 395.

0. 01 torr is one order of magnitude above high vacuum, where fluids are in the free molecular flow regime, i. e. the mean free path of molecules is comparable to the size of the equipment.

By exposing an azeotrope to a vacuum or positive pressure, it's possible to bias the boiling point of one component away from the other by exploiting the differing vapour pressure curves of each ; the curves may overlap at the azeotropic point, but are unlikely to be remain identical further along the pressure axis either side of the azeotropic point.

In the field of high-energy particle physics, the fundamental velocity unit is the speed of light c. Thus, dividing energy in eV by the speed of light in vacuum, one can describe the momentum of an electron in units of eV / c.

By contrast, the Gemini capsule's avionics were designed so the cabin could be exposed to the vacuum of space when one of two large hatches was opened, so no airlock was required, and both the spacewalking astronaut and his companion command pilot were in vacuum during the EVA.

He constructed and patented in London a low-lift combined vacuum and pressure water pump, that generated about one horsepower ( hp ) and was used in numerous water works and tried in a few mines ( hence its " brand name ", The Miner's Friend ), but it was not a success since it was limited in pumping height and prone to boiler explosions.

Because the existence of these points of space as such, that is, as truly indivisible unities, has its basis in the fact that the points are one with the bodies that fill them ; because, therefore, all possible space is coincident with the physical world ( as in Wycliffe's system, in general, reality and possibility correspond ), there can as little be a vacuum as bounding surfaces that are common to different bodies.

Primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarisation, while its speed in a vacuum, 299, 792, 458 meters per second ( about 300, 000 kilometers per second ), is one of the fundamental constants of nature.

To Robert Boyle in the 17th century, a little before Isaac Newton, the aether was a probable hypothesis and consisted of subtle particles, one sort of which explained the absence of vacuum and the mechanical interactions between bodies, and the other sort of which explained phenomenon such as magnetism ( and possibly gravity ) that were inexplicable on the basis of the purely mechanical interactions of macroscopic bodies:

In addition, Maxwell's equations required that all electromagnetic waves in vacuum propagate at a fixed speed, c. As this can only occur in one reference frame in Newtonian physics ( see Galilean-Newtonian relativity ), the aether was hypothesized as the absolute and unique frame of reference in which Maxwell's equations hold.

Of course, air is only one possible medium to use in a realization of the metre, and any partial vacuum can be used, or some inert atmosphere like helium gas, provided the appropriate corrections for refractive index are implemented.

An absolute pressure measurement is one that is referred to absolute vacuum.

A very simple version is a U-shaped tube half-full of liquid, one side of which is connected to the region of interest while the reference pressure ( which might be the atmospheric pressure or a vacuum ) is applied to the other.

If one assumed that magnetopause was just a boundary between a magnetic field in a vacuum and a plasma with a weak magnetic field embedded in it, then the magnetopause would be defined by electrons and ions penetrating one gyroradius into the magnetic field domain.

The closed ecology of a space station is satirized in Ethan of Athos, with the emphasis on preventing microbial contamination, the air supply dependent on algae and newts, the processing of dead or contraband animals ( and one dead human ) into vat meat supplies, and the storage of garbage in the vacuum outside the station.

After attacking and destroying monasteries, including one at Jumieges, they took advantage of the power vacuum created by the disintegration of Charlemagne's empire to take northern France.

Usually, each instance will have a unique name, so that if you have two instances of vacuum cleaners, one might be " vac1 " and the other " vac2 ".

However, the extreme resistance of Deinococcus radiodurans to radiation, cold, dehydration and vacuum shows that at least one known organism is capable of surviving the hazards of space without need for special protection.

This would render the vacuum unstable against decay into a cluster of electrons on one side of the universe and a cluster of positrons on the other side of the universe.

An early computer might use a hand-wired CPU of vacuum tubes, a magnetic drum for main memory, and a punch tape and printer for reading and writing data.

However, the principle of operation might be more precisely described as gas-jet pump, since diffusion plays a role also in other high vacuum pumps.

In its Audion leaflets, the De Forest company even warned against any operation which might lead to too high a vacuum.

Physicists often discuss ideal test results that would occur in a perfect vacuum, which they sometimes simply call " vacuum " or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space.

The argument has been made that sonoluminescence releases too large an amount of energy and releases the energy on too short a time scale to be consistent with the vacuum energy explanation, although other credible sources argue the vacuum energy explanation might yet prove to be correct.

The differential sail was a speculation that it might be possible to induce differences in the pressure of vacuum fluctuations on either side of sail-like structure — with the pressure being somehow reduced on the forward surface of the sail, but pushing as normal on the aft surface — and thus propel a vehicle forward.

They can be bought pre-sliced in vacuum packs at a supermarket or grocery store, or they can be purchased at a delicatessen or deli counter, where they might be sliced to order.

Although it might be thought that this industrially important property is due entirely to the loose interlamellar coupling between sheets in the structure, in fact in a vacuum environment ( such as in technologies for use in space ), graphite was found to be a very poor lubricant.

In non-surgical practice, the corrective approaches might consist either of an externally-applied vacuum device, which will expand the tissues of the recipient site, or of oral medications ; yet, in most instances, the medium-volume, fat-graft augmentation of the breast is limited to one brassière cup-size, or less.

In partial vacuum, this breakdown potential may decrease to an extent that two uninsulated surfaces with different potentials might induce the electrical breakdown of the surrounding gas.

* ISI competitions do not link events together: unlike serious competitions, in which skaters might be required to skate both " short " and " long " programs, with the final results being a composite of the two programs, each ISI event is ( except for its effect on team standings ) a single program skated " in a vacuum.

Since in a vacuum region, it might seem that according to general relativity, vacuum regions must contain no energy.

For the dramatic climax to be left undepicted leaves something of a vacuum for the reader: knowing full well the horrors established in the past hundreds of pages, the kid's unstated fate might still be too awful to describe, and too much for the mind to fathom: the sight of the kid's fate leaves several witnesses stunned almost to silence ; never in the book does any other character have this response to violence, again underlining the singularity of the kid's fate.

The proposals of Haisch and Rueda for zero point energy might ultimately provide no cost " energy from the vacuum ", thereby solving many current problems in contemporary human society.

Dyson reportedly hypothesized the same principle might work, on a smaller scale, in a vacuum cleaner.