He vacuums a third time, for a few seconds longer. power/political/moral etc vacuum the political vacuum … ð, Using a machine to vacuum the dirt off the rug is much easier than having to clean it by hand. Vacuum (noun) a space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum. Physicists often say, and laypersons books repeat, that the two el… ð, I have washed and waxed the outside of my car, so the only thing left to do is vacuum the floor mats. The disappearance of religious beliefs has left a vacuum in many people's lives. 4. Often a phrase is used to help remember the order of the groups of … The definition of a vacuum is a space devoid of air or matter, or a tool that uses suction to clean. After the water in the kettle has boiled, the water stays hot for at least 2 hours. : A standard central vacuum canister works on the same principle as a conventional cleaner. has a pressure (there is usually little reason to care about it though). Inside a vacuum system at atmospheric pressure, before the pumps start the evacuation, the density of the gas molecules will be the same in all parts of the system. These cookies do not store any personal information. As a mechanical wave, sound requires a medium in order to move from its source to a distant location. Some pumps and all vacuum cleaners work by suction. Vacuum, space in which there is no matter or in which the pressure is so low that any particles in the space do not affect any processes being carried on there. The vacuum is not empty. His sudden departure created a vacuum at the head of the company. Vacuum in a sentence 1. Definition of vacuum_1 noun in Oxford Advanced Learner's Dictionary. After the maid swept the area, she had to vacuum the dirty living room carpet. Definition of Vacuum. (Entry 1 of 2) 1 : emptiness of space. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. (The same is true if an electron and a positron pass near each other, as in Figure 2; the disturbance in this case is similar in type but different in its details, with the result that the oppositely charged electron and positron are attracted to each other.) This disturbance is important, because the force that the two electrons exert on each other the repulsive electric force between the two particles of the same electric charge is generated by this disturbance. The lower the pressure, the "better" or "higher" the vacuum. Don't bang your … Military leaders stepped in to fill the political vacuum. to suck up dirt and other debris from a surface (usually carpet) using a household device with the same name, It took the party planner an hour to vacuum all the confetti littering the dance floor. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. As in any discipline, understanding the underlying scientific principles has profound practical implications when properly understood. The vacuum cleaner has various attachments. ð, After the maid swept the area, she had to vacuum the dirty living room carpet. Only after the realization of a sufficiently low vacuum, many experiments in atomic, molecular and nuclear physics became possible. 2 a : a space absolutely devoid of matter. 14. An example of … In other words, it is a region that has a gaseous pressure much lower than that of atmospheric pressure. in an evacuated tube in the lab), a) its kinetic energy increases and its gravitational potential energy decreases. Vacuum the inside of the cabinet to remove lint and dust. Vacuum cleaner in a sentence 1. b : a space partially exhausted (as to the highest degree possible) by artificial means (as an … Eveidently the tenant had neither heard of a vacuum cleaner nor a window cleaner. Many children are growing up in a moral vacuum. I just added a sentence about this in the lead, but would propose to also change the first sentence to something like "Vacuum can refer to space completely devoid of mater or … to suck up dirt and other debris from a surface (usually carpet) using a household device with the same name. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. A quantum vacuum thruster (QVT or Q-thruster) is a theoretical system hypothesized to use the same principles and equations of motion that a conventional plasma thruster would use, namely magnetohydrodynamics (MHD), to make predictions about the behavior of the propellant.However, rather than using a conventional plasma as a propellant, a QVT would interact with quantum vacuum … There is a policy vacuum on climate change. The vacuum cleaner has various attachments. Nature abhors a vacuum. We also use third-party cookies that help us analyze and understand how you use this website. Medical Definition of vacuum. Therefore, vacuum physics and techniques paved the way for the development of modern high-technology and our industrial society. Sentence examples for a vacuum in a from inspiring English sources. You also have the option to opt-out of these cookies. In this series of articles, we will review the first principles of vacuum technology and explain them using real-world illustrations. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. 2. Also note that, technically, a gas of planets and comets etc. In this introduction to the physics and technology of vacuum the basic concepts of a gas composed of atoms and molecules are presented. 3. From Longman Dictionary of Contemporary English vacuum vac‧u‧um 1 / ˈvækjuəm, -kjʊm / noun 1 [countable] HP EMPTY a space that is completely empty of all gas, especially one from which all the air has been taken away 2 [countable] DHC a vacuum cleaner 3 [singular] NOT HAVE a situation in which someone or something is missing or lacking create/leave a vacuum (in something) Her husband’s death left a vacuum in her life. A partial vacuum is a vacuum with low amounts of matter enclosed. Electromagnetic waves travel at 300,000,000 metres per second (m/s) through a vacuum. These cookies will be stored in your browser only with your consent. By clicking âAcceptâ, you consent to the use of ALL the cookies. A total, perfect, or absolute vacuum has no matter enclosed. To face such odd situation, we have a vacuum cleaner to get a clean environment in the house. 2. From the Cambridge English Corpus. RELATED ( 11 ) a depression in a. a vacancy in a. a load in a. a void in a. a blank in a. a shortcoming in a. a limbo in a. a gap in a. a environment in a. a loophole in a. a cleaner in a. exact ( 11 ) Sound cannot travel through a region of space that is void of matter (i.e., a vacuum). Renamo fighters were operating to a degree in a power vacuum. He could also learn to use the vacuum cleaner, the washing machine and other household appliances. Crews used long yellow hoses to vacuum oil from the water. 4. ... No sentence is correctly fitting. This website uses cookies to improve your experience while you navigate through the website. In my Vacuum Physics 101 course, you’ll learn all about various aspects of vacuums. As the filling cools, it will create a vacuum seal. If a particle is in a free fall in vacuum (e.g. The hydrostatic pressure exerted on a submarine does not depend on a) the surface area of the submarine. PHYSICS Foundation Tier Unit Physics P1 ... Use the correct answer from the box to complete each sentence. With accelerators, nuclear and high-energy elementary- particle physics began. In a vacuum definition: If something is done in a vacuum , it is not affected by any outside influences or... | Meaning, pronunciation, translations and examples ð, After making a huge mess with his muddy boots, the farmer had to vacuum the carpet in the den. It is mandatory to procure user consent prior to running these cookies on your website. 用vacuum physics technology造句, 用vacuum physics technology造句, 用vacuum physics technology造句, vacuum physics technology meaning, definition, pronunciation, synonyms and example sentences are provided by ichacha.net. The companies produce micro-filtration bags contain vacuum cleaners which can capture 99% of the dust particles of size up to 0.3 microns. What political ideas have filled the vacuum left by the fall of communism? Note that space is not a perfect vacuum. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. : He discovered the Schottky effect, an irregularity in the emission of thermions in a vacuum tube and invented the screen-grid tetrode tube. The apparent void … A sound wave is a mechanical wave that propagates along or through a medium by particle-to-particle interaction. The importance of vacuum physics for the development of modern physics and technology can be hardly overestimated. In engineering and applied physics vacuum refers to any pressure lower than atmospheric. From the Cambridge English Corpus. All the inventions and sophisticated technological developments of today would have been unthinkable without high vacuum and its technology. How can I put and write and define vacuum physics technology in a sentence and how is the word vacuum physics technology used in a sentence and examples? It may sound like magic to laypeople but the problem has preoccupied physicists since the birth of quantum mechanics. My name means “a lark in a vacuum” in Japanese, referring to the famous anecdote that Robert Boyle, the scientist behind Boyle’s law, experimented with larks to prove that sound doesn’t travel in a vacuum. 3. Examples of Vacuum in a sentence. But opting out of some of these cookies may have an effect on your browsing experience. The density of the gas molecules changes as the chamber is evacuated, from relative high density at the start – atmospheric pressure, to a lower density under vacuum conditions. From Longman Dictionary of Contemporary English, a situation in which someone or something is. Sound waves cannot travel through a vacuum. It's difficult to see vacuum in a sentence . Many people out there love the vacuum cleaner to reduce the allergic environment in the house. Hi! The physician then uses a vacuum pump to remove the brains. noun (Physics) A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means. I. [3 marks] ... A new type of electric kettle is made from two layers of plastic separated by a vacuum. The leader's sudden death created a power vacuum. These gas particles are contained in a partially empty volume 6. But despite the conventional wisdom, physicists in the UK discovered that a decaying atom travelling through a complete vacuum would experience a friction-like force, and now they've figured out how this reinforces - rather than breaks - Einstein's theory of general relativity.
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