Sentences with phrase «surface in a vacuum»

A two - dimensional boron allotrope forms after depositing its elemental vapor on a silver surface in vacuum.

One example is known as the Casimir effect, predicted to exist in 1948 by the late Dutch physicist Hendrik Casimir, in which quantum fluctuations create an attractive force between two surfaces in a vacuum.

The function performed by the imagined structures is to move alien vehicles using light sails, in which powerful light beams propel a reflective surface in the vacuum of space.

Not exact matches

The Surface Pro 3 boasts some nice improvements over its successors, to the point where it's almost a pretty sweet gadget — if it existed in a vacuum.

It reminds me of the story of the Apollo 15 astronauts standing on the surface of the moon and dropping a feather and a hammer to demonstrate Galileo's theory of objects in gravity fields in vacuums.

The partial vacuum and short residence time within the Vaction ™ unit prevents the exposure of ingredients to excess temperatures, in turn, preventing contact with the kettle's surface which can burn and affect the finished product's flavour and visual quality.

Miniaturization is the key: Experiments that once required a room full of lasers, optical elements, and vacuum systems can now fit in a device the size of an ice chest, with the atoms trapped on the surface of a microchip.

If the process is done in a vacuum, the carbon forms on the surface as graphene; if it is done in oxygen, it forms GO; and if done in a humid atmosphere followed by a vacuum, it forms as rGO.

For this particular research, the scientists tested samples of common salt — sodium chloride — along with mixtures of salt and water, in their vacuum chamber at Europa's chilly surface temperature of minus 280 degrees Fahrenheit (minus 173 Celsius).

Near Attica, Kansas, they emerged from the rain and looked skyward, taking in the sector of the storm that vacuumed up warm surface air and thrust it high into the atmosphere.

In the new study, researchers placed tiny particles of silicon carbide (one represented by the group of tan molecules in this artist's concept) covered with graphite (hexagonal networks of gray atoms) in a vacuum chamber that duplicated the deep - space conditions surrounding many stars (temperatures between 900 and 1500 kelvins and pressures less than one - billionth that found at Earth's surfaceIn the new study, researchers placed tiny particles of silicon carbide (one represented by the group of tan molecules in this artist's concept) covered with graphite (hexagonal networks of gray atoms) in a vacuum chamber that duplicated the deep - space conditions surrounding many stars (temperatures between 900 and 1500 kelvins and pressures less than one - billionth that found at Earth's surfacein this artist's concept) covered with graphite (hexagonal networks of gray atoms) in a vacuum chamber that duplicated the deep - space conditions surrounding many stars (temperatures between 900 and 1500 kelvins and pressures less than one - billionth that found at Earth's surfacein a vacuum chamber that duplicated the deep - space conditions surrounding many stars (temperatures between 900 and 1500 kelvins and pressures less than one - billionth that found at Earth's surface).

He was elected a Fellow of the American Vacuum Society in 2000 in recognition of his record of fundamental surface science and catalysis research.

For this work, he has used a number of ultra-high vacuum surface science techniques to, for example, identify and explain several very unusual mechanistic features of the heterogeneous chemistry occurring in a catalytic converter including: a) the dramatically different CO oxidation reaction mechanism on ruthenium metal relative to other late transition metals; b) the structure sensitive selectivity of the NO reduction reaction on rhodium metal; c) deactivation of rhodium metal at high oxygen partial pressures; and d) the significantly different CO oxidation reaction mechanism over oxidized rhodium metal.

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Many of these customers are working at the forefront of new technology - in the fields of plasma research, surface science, vacuum processing and gas analysis.

Then, they introduced a small amount of water onto the surface in ultrahigh vacuum (that is, no pressure) and very low temperatures.

Heating the nanotubes in a vacuum above 200 degrees Celsius (392 degrees Fahrenheit) reduced surface contamination, but not enough to eliminate inconsistent results, they found.

Cowin and his team are now developing an instrument to permit examination of reactions on the surface of water in a vacuum at higher temperatures.

They then either heated the nanotubes in a vacuum or bombarded them with argon ions to clean their surfaces.

The vacuum also enhanced steam condensation rates on the inside surface of the submerged containment in the case where steam is vented from the reactor vessel, which in turn provides for very effective heat removal from the primary system.

Like you mention, getting on a flat surface (with wheel chocks of somesort), and not using the brake, to avoid changing engine vacuum abruptly when it's in this delicate state.

Vacuuming the floors and other surfaces in the house can also help get rid of adult fleas, eggs, larvae, and even pupae that are hiding in crevices, small cracks, and other hard - to - reach areas inside the house.

Sprinkle it on bedding, upholstered furniture, carpets and other surfaces in your home; work it in with a broom and leave it down for a few hours or overnight; then vacuum thoroughly.

You will also want to invest in a good vacuum cleaner that is strong enough to pick up hair off of carpet and hard floor surfaces.

This does not happen in a vacuum of course but painting is a unique aesthetic situation where color can exist as color, as visible phenomenon of light and surface.

Another technique involves using a dry soft sable brush to lightly brush the surface in order to dislodge dust while holding a vacuum, off the surface, to capture and remove debris.

How could it be otherwise, with a core temperature of some 5000 K or more, sitting in the vacuum of outer space, with its nearest decent source of heat unable to maintain an average surface temperature of more than 255 K or so?

If a black body with a fixed - rate energy source is in radiation - rate - equilibrium with the vacuum of space at 0 Kelvins, placing additional material separate from but surrounding the black body will likely cause the temperature of the surface of the black body to change in such a way that energy - rate - equilibrium is re-established for the black body.

It is better than being in vacuum such as on the moon, yes, but given the atmosphere's presence on the Earth, it is not slowing down cooling at the surface within its own parameters.

In this case I can see no reason to suspect that the vacuum «bubbles» will effect the equilibrium surface temperature at all.

(The air heated by condensation will continue to rise, but there can't be «vacuum» around the condensation, the colder air at that level will come in to replace any lighter hotter air rising, and colder is heavier so will sink which increases the pressure at the surface.)

As a matter of fact the radiation flow from the surface absorbed by the air is within a few percent equal to the radiation of the air impinging on the surface: that is very different of the greenhouse glass panel in the vacuum that absorbs all of the thermal infrared radiation from the surface and emits half of it upwards and half of it downwards back to the surface.

Afterwards the handbook provides the equations of the window in the vacuum between the surface and the cosmos with a air - to - surface radiation flow half of what it is in reality.

«Do you believe a sphere heated to stable temp through illumination in vacuum, can be immersed in a frigid nitrogen / oxygen bath, and have every temperature sensor on it's surface indicate temperature rise of 90F / 30C?

D Cotton June 15, 2013 at 6:38 am The whole of the pseudo physics of greenhouse effects and assumed heating of the surface by back radiation (or «radiative forcing») is trying to utilise the Stefan - Boltzmann equation which only relates to bodies in a vacuum losing all their energy by radiation without any conduction or evaporative cooling.

In reality, radiation reflects off the planet's surface and is re-radiated many many times as it makes its way back toward the vacuum of space.

When the fraction of dry ice increase in an already very cold atmosphere full of watervapor at a mean temperature of -18 C, surrounded by the ultimate heat sink of space vacuum at 3K, without any radiant barriers, heated on half the surface area and cooled from double the size of the heated area, it makes the temperature increase?

A point at.0001 mm ABOVE the surface of an atmosphereless sphere is the same as any point in a vacuum at that distance from the sun it seems to me.

I believe that if in the vacuum of space you place a blackbody object with (a) a constant (i.e., unchanging energy per unit time) internal thermal energy source, and (b) internal / surface thermal conduction properties such that independent of how energy enters the blackbody, the surface temperature of the blackbody is everywhere the same and you place that object in cold space (no background thermal radiation of any kind), eventually the object will come to a steady state condition — i.e., the object will eventually radiate energy to space at a rate equal to the rate of energy produced by the internal energy source.

• Carry out maintenance and cleaning jobs to make sure that the buildings and grounds remain clean and tidy • Use hand tools such as brooms, mops, brushes as well as power tools like vacuum cleaners for maintenance of cleanliness • Walk the facility to see if any maintenance needs to be done • Paint areas of the garage and office when needed • Sustain vehicle maintenance in terms of oil changes, tire pressure and general cleanliness • Maintain cleanliness and tidiness of surfaces like doors, windows, signs, walls, and poles • Keep the facility clean of engine oil spills and spills of other fluids such as brake oil • Report violations of company policies to the manager

Performs a range of housekeeping duties including waste removal, dusting, and cleaning of fixtures and surfaces; removes soiled linen, clean, sanitize, and make beds in ED and admitting floors; vacuum carpets and rugs; replenish bathroom supplies with paper, towels, and soap

As the enclosed resume demonstrates, I am very expert in changing linens and maintaining the cleanliness rooms, wiping down and polishing the lamps, dresser, desk and all washable surfaces along with vacuuming carpets while ensuring that nothing missed in the preliminary cleaning of the room.

Nashville High School — Hawthorne, NJ August 2009 — Present School Housekeeper • Perform vacuuming and dusting activities on various surfaces and upholstery • Mop floors with hand mops and use buffing machines on marble and other hard surface flooring • Dust furniture, counters and doors and windows • Clean restrooms and replenish supplies • Empty waste bins and put them in recycler • Report defects to the maintenance department

HOMEWATCH CAREGIVERS, Salt Lake City, UT (5/2008 to Present) Private Housekeeper • Determine the daily needs of the household and make lists to ensure that they are taken care of • Clean surfaces in living areas, halls, bedrooms and kitchens by sweeping and cleaning • Wash bathrooms and ensure that they are disinfected on a regular basis • Replenish supplies such as toilet paper, soap and towels in bathrooms and powder rooms • Perform laundry duties by carefully separating colored clothes from white ones and ensuring that they are washed and dried separately • Ascertain that clothes and linen are properly ironed and hung / placed in dedicated closets • Develop menus according to household members» specific tastes and nutritional needs and ensure that food items are cooked accordingly • Dust and polish furniture and fixtures on a regular basis and change light bulbs as required • Clean rugs by vacuuming or washing them and ensure that they are properly dried before reinstalling them • Run errands such as grocery shopping and bills payment • Supervise and train other housekeeping staff to ensure delivery of exceptional services

THE PRIVATEERS, Salt Lake City, UT (1/2000 to 5/2008) Housekeeper • Swept and mopped surfaces in bedrooms, living rooms and halls • Washed and disinfected bathrooms and powder rooms • Replenished supplies such as soap, shampoo, toilet paper and towels in bathrooms • Made beds and changed linen on a regular basis • Dusted and polished brass and silver fixtures and ensured that all wood furniture is cleaned properly with revitalizers • Washed windows and dusted blinds along with ensuring that drapes are vacuumed or washed properly • Assisted in the kitchen by chopping vegetables and meats as part of food preparation duties • Answered telephones and took messages and served refreshments to guests

Housekeeping Assistant • Assist head housekeeper in creating staff schedules according to each member's individual capabilities • Distribute schedules to staff members and provide them with information on how to handle each duty • Over the general cleanliness and maintenance of the hotel by inspecting each area in detail • Ascertain that trash is appropriately collected from rooms and offices and disposed of in the right manner • Perform cleaning activities including dusting, sweeping, mopping and vacuuming • Clean spills and soiled areas and ensure that each surface within the hotel in sanitized • Train housekeeping staff members in safely mixing and using cleaning agents • Interview, hire and train new members of the housekeeping team and ensure that they understand compliance issues thoroughly • Maintain work and storage areas by ensuring that they are kept neat and cleaned as often as possible • Maintain inventory of cleaning supplies and equipment and ensure that supplies are procured before they run low

• Cleaning surfaces in kitchen, halls and rooms • Deep cleaning carpeted and non-carpeted areas and soft furnishings • Storing linen and handling laundry activities associated with linen washing and pressing • Operating cleaning equipment such as washing machines and vacuums

A challenging Research scientist position with a high growth engineering company specializing in manufacturing of semiconductors, superconductors, vacuum and surface science instrumentation, and other high tech materials and also testing them.

Vacuum the floors, dust the surfaces, wash your bedding, open up the windows wide to let fresh air in.