what does it mean for physical change to be reversed
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Translations for physical change Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means.
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Hypertrophic Arthritic Changes Within the Lumbar Spine The term hypertrophy means enlargement. Hypertrophic change in muscles is a positive adaptation to athletic training. Hypertrophic arthritic changes in the lumbar spine are also adaptive, but are not viewed in such a positive light. These changes are often associated with reduced mobility, pain and stiffness. Hypertrophic arthritic changes of the lumbar spine sometimes compress nerves and cause numbness and weakness in the legs.
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- Changing the electronic structure usually means that a bond has broken or formed, which is a chemical change. However, certain types of color changes are physical. For example, when you heat a piece of metal and it begins to glow red, then orange, then yellow as you increase the heat, that's a purely physical change.
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mass, volume, density Examples of physical change: in a physical change, a substance keeps its chemical composition. Examples are: freezing, boiling, evaporation, tearing and crushing. It is easy to reverse.
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Is Boiling Water a Chemical or Physical Change? Physical changes affect the state of an item, and a chemical change happens at a molecular level. Chemical changes involve atomic bonds being created or broken during chemical reactions. When iron rusts because it is exposed to the oxygen, that is a chemical change. In this instance, the molecules change their structure and become iron oxide.
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- No. A physical change is a change that does not change the chemical composition of a substance, while a chemical change does change the chemical composition of a substance.
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- No, a change of state is not a chemical change, for it can be changed back to its original form and their is no change in the molecular composition of the substance. A chemica … l change is when it cannot be changed back. The above example is an example of a physical change. Example:- ice when heated changes into water and water when cooled changes into ice.
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Chemical & Physical Changes A chemical change makes a substance that wasn't there before. There may be clues that a chemical reaction took places, such as light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same, even though they may look different.
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Physical and Chemical Changes This would be a physical change in the shape and size of the paper. If the same piece of paper is burned, it is broken up into different substances that are not paper. Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all.f the same piece of paper is burned, it is broken up into different substances that are not paper. Physical changes can be reversed, chemical changes cannot be reversed with the substance changed back without extraordinary means, if at all.
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- Chemical Change: A chemical change is a reaction that transforms (changes) a substance into a new substance or substances with different properties. Physical Change: No new su … bstances are made. It is fairly easy to reverse this kind of change. An example would be dissolving salt in water.
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The difference between property and change (as in physical property and change?) Please Help? Report Abuse. a physical property is the freezing point of water is 0C a physical change is actual water freezing or ice melting a chemical property is that paper burns in the presence of oxygen and high enough temperatures, a chemical change is actual paper burning and producing ash and other by products. Teresa P · 7 years ago.
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Sex change For other uses, see Sex change (disambiguation) . Sex change is a process by which a person or animal changes sex – that is, by which female sexual characteristics are substituted for male ones, or vice versa. Sex change may occur naturally, as in the case of the sequential hermaphroditism observed in some species.
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What classifies a change as a physical change? A physical change is one where the substance has changed in appearance, but not in chemical structure. Physical changes can occur when heat energy is added to or taken away from a substance.
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How can a change in color be a physical change? A change in colors is usually due to a chemical change, but there are a few special cases where it's a physical change (su … ch as in a mood ring). change in colors is usually due to a chemical change, but there are a few special cases where it's a physical change (su … ch as in a mood ring).
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Difference Between Chemical and Physical Change Summary: 1. Physical Change means the material is only physically altered but does not change its molecular structure; Chemical change alters the basic molecular structure of the material. 2. A Chemical change may also cause a physical change; a physical change alone cannot lead to a chemical change. 3. A Physical change is superficial and can possibly be reversed; a chemical change is complete and permanent.
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Funtime Foxy is male? So, in summary, there are really only two criteria for whether a change is chemical or physical: 1) After the change does it look the same and 2) can you change it back? If the answer is yes, the change is physical every time. If the answer is no the change is chemical every time.
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Tarnish is a chemical or physical change? Best Answer: Tarnishing is a chemical change because it means the metal is being oxidized, or, in other words, it is reacting with something. Source(s): Jordan H · 1 decade ago
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Reversible changes Reversible changes are changes that can be undone or reversed. Melting, freezing, boiling, evaporating, condensing, dissolving and also, changing the shape of a substance are examples of reversible changes.
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Is Rusting a Chemical Change? No new substances are produced during a physical change. However, chemical changes always result in the formation of one or more new substances. The rusting of iron, during which the new substance iron (III) oxide forms from iron (Fe) and oxygen, (O2), is an example of a chemical change.
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- I. Physical Changes. A physical change is any change NOT involving a change in the substance's chemical identity. Here are some examples: (1) any phase change. Moving between solid, liquid and gas involves only the amount of energy in the sample (this amount is the subject of future lessons). There is no effect on the chemical identity of the substance. For example, water remains water, no matter if it solid, liquid or gas.
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The Doctor ( Doctor Who) This article is about the main character of the Doctor Who TV series. For the current Doctor, see Twelfth Doctor. For the Doctor as portrayed in the 1960s Dalek films, see Dr. Who (Dalek films). The Doctor is the title character and protagonist in the long-running BBC science fiction television series Doctor Who. The character has also been featured in one made-for-television film, and a vast range of spin-off novels, audio dramas and comic strips connected to the series. In the series, the Doctor is the alias assumed by a centuries-old alien who travels through space and time in his TARDIS, frequently with companions.
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Physical and Chemical Changes A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed. For example, if a piece of paper is cut up into small pieces it still is paper.
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changeover 1. an alteration or complete reversal from one method, system, or product to another: a changeover to decimal currency. 2. a reversal of a situation, attitude, etc. 3. (Athletics (Track & Field)) sport. a. the act of transferring to or being relieved by a team-mate in a relay race, as by handing over a baton, etc.
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Physical Science: Session 4 Physical change: Although some extensive properties (like shape, phase, etc.) of the material change, the material itself is the same before and after the change. A nail rusting: an example of chemical change.
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- A change is called irreversible if it cannot be changed back again. For example you cannot change a cake back into its ingredients again. Irreversible changes are permanent. They cannot be undone.
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Difference Between Physical and Chemical Change Another big difference between physical and chemical change is the speed of transformation. Physical change occurs faster and sometimes instantaneously. Most chemical changes, on the other hand, take longer time to become discernible. You can crumple a tin can and you will immediately see physical changes. But corrosion of tin can occurs very slowly; it will take a long time before you see the appearance of rust on the can. There is a wide difference between physical and chemical changes. With physical change, you are not transforming the original molecular composition of the substance. But with chemical change, the molecular structure is being transformed thus you will get a new substance.