Sentences with phrase «small dust particles»

Small dust particles from soil, animal dander, cooking residue, and soot residue from a fireplace and candles are all common sources of household particulates.

Blue skies and red sunsets are in effect attributable to the preferential scattering of short (blue) wavelengths by air molecules and small dust particles.

«The dust distribution is a telltale sign of how dynamically interactive the inner system containing the ring is,» said Glenn Schneider of the University of Arizona, Tucson, who used Hubble's Space Telescope Imaging Spectrograph (STIS) to probe and map the small dust particles in the outer reaches of the HR 4796A system, a survey that only Hubble's sensitivity can accomplish.

The suspected cause of these spiking calcium levels is a shower of small dust particles hitting the planet and knocking calcium - bearing molecules free from the surface.

Researchers using the Atacama Large Millimeter / submillimeter Array (ALMA), have for the first time, achieved a precise size measurement of small dust particles around a young star through radio - wave polarization.

Earlier observations using ESO's Very Large Telescope had already shown that the small dust particles also formed a similar ring structure.

Why are smaller dust particles selectively located in the gap in the disk?

Not exact matches

This item is smaller than most others in its product category, but it's just as effective when it comes to eliminating pollen, dust, and other pesky particles.

But Apple's quest for thinness also came with a downside: dust or other small particles can get stuck under the spacebar or other keys and make it unresponsive.

It's not just that it would be much too small for any human being to see - theorists predict that it will weigh billions of times less than a typical dust particle, and will have only the briefest of lives.

The convenient tea bags composed of small leaf particles and dustings were practical but the ingredients lacked substance.

It has a swivel steering design and can pick up large debris with the nozzle but there's still the 2 amp motor that can get even small particles of dust.

The particles of rock and ice in these belts vary in size from the tiniest dust grain, smaller than a millimetre across, up to asteroid - like bodies many kilometres in diameter [2].

Earlier, in 2000 and 2002, the craft positioned aerogel collectors on the opposite side of the arm to snare particles of interstellar dust, suspected to be as small as one - tenth the size of comet grains.

«The icy small bodies warm up as they approach the Sun, and the ice sublimes to form a coma [a dense cloud of gas and dust particles around a nucleus] and often a tail, making the comets observable,» she explained.

It found that small particles existing at 150 km or higher above Earth's surface could be knocked beyond the limit of Earth's gravity by space dust and eventually reach other planets.

Instead, the team proposes, soot and other particles in the ships» exhaust create large numbers of cloud droplets that are, on average, smaller than those forming around natural dust particles in the air elsewhere over the ocean.

Most non-photosynthetic plants have very small seeds that can be dispersed by the wind like dust particles.

The deserts of the Middle East are a large source of «mineral dust,» small particles of sand that are brought into the atmosphere by wind and thermals.

In the macroscopic view, such particles are indeed large, but in the microscopic view, each small part of a large dust particle scatters radio waves and produces unique polarization features.

Blue sky arises because of the way light scatters off dust and cloud particles, which tend to reflect back toward Earth only the smaller wavelengths — the blues and purples.

The researchers compared the results of small - scale numerical simulations of colliding rock and dust particles to the composition of meteorites.

He says that the «key point is that the urban pollution cloud comprises predominantly small acidic particles... which penetrate indoors and persist for long periods in air, whereas industrial dust clouds consist mainly of much larger particles».

The Hubble images also show the second disc is relatively red, suggesting the dust particles are even smaller than suspected.

«As these small, dusty clumps or dust particles bang into one another they form larger and larger, almost fairly - castle structures,» Ciesla explained.

These techniques will allow us to investigate other small - scale extraterrestrial materials such as micrometeorites, interplanetary dust particles, and cometary particles in future studies.»

«Despite their small size, these interplanetary dust particles may have provided higher quantities and a steadier supply of extraterrestrial organic material to early Earth,» said Michael Callahan of NASA's Goddard Space Flight Center in Greenbelt, Md. «Unfortunately, there have been limited studies examining their organic composition, especially with regards to biologically relevant molecules that may have been important for the origin of life, due to the miniscule size of these samples.»

For example, as much as 29 percent of global anthropogenic emissions of small particulate matter (tiny solid particles and liquid droplets from dust to metals that can penetrate deep into the lungs) come from trash fires, she estimates.

In fact, the addition of dust particles could instead create more water droplets too small to rain down or even build a respectable cloud.

Small particles of gas and dust clumped together into larger and more massive meteoroids that in turn smashed together to form planets.

Careful analysis of the polarisation results revealed these grains of dust to be comparatively large particles, 0.5 micrometres across, which may seem small, but grains of this size are about 50 times larger than the dust normally found in interstellar space.

Although the air looks thick, those visible dust particles are so big that they can't reach the smallest branches of the respiratory tree in your lungs.

«Dust particles in livestock facilities: Sweat the small stuff.»

The ratio indicates that smaller, micrometer - sized, dust particles dominate and larger dust particles are absent in the most prominent gap with a radius of 22 astronomical units.

Researchers found that the size of the dust particles in the inner 22 au gap is smaller than in the other bright regions and guess that a planet similar to Neptune is located in this gap.

One drawback, however, is its small dirt capacity: The particle bin and dust filter must be emptied after each use.

Beyond the Sun, its eight planets, and their larger moons, the solar system is home to a myriad of other, smaller bodies, including dwarf planets, asteroids, trojans, centaurs, and comets, all the way down to interplanetary dust particles.

Three instruments are used to detect fine dust and ultrafine dust, i.e. the smallest atmospheric particles.

* 1: Cosmic dust consists of small solid particles composed of silicon, carbon, iron and other elements about the size of 0.1 micrometer.

Cosmic dust is small solid particles consisted of silicon, carbon, iron and other elements with the size smaller than 1 micrometer.

Comets and comet clouds form early in the life span of a solar system, and are primarily composed of frozen gases, rocks and dust, coalescing out of clouds of smaller particles into the cosmic bodies with trademark tails we're familiar with.

Comets might form by combining smaller ice particles, including ice condensed as frost on microscopic dust grains that somehow formed.

Dust devil winds carry the small, negatively charged particles high into the air, while the heavier, positively charged particles remain near the base of the dust deDust devil winds carry the small, negatively charged particles high into the air, while the heavier, positively charged particles remain near the base of the dust dedust devil.

Plants may even remove particles from the air: One study showed that in a small office, they reduced dust by up to 20 %!

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Caution removing the dust as older shoes may contain asbestos, and all brake dust has small particles whose composition are unknown to you when you work around them.

Compensations are also made for dust, wear out and other small particles on the optical surfaces as well as for variation in component quality.

Though the 3DS» clamshell design would seem to protect the vulnerable screens from scratches and wear, in practice it actually traps dust and grit inside the unit, while the raised bezel around the lower screen can quickly cause unsightly scratches on the top screen if small particles settle on it.

She examines how infinitesimally small particles connect us to our present, past, and future: how we are born of dust, how we return to it, and how we are all forever connected through it.

The remainder is made up with the other minor greenhouse gases, ozone and methane for instance, and a small amount from particles in the air (dust and other «aerosols»).