PHYSICAL



A physical property is any property that is measurable, whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its changes between momentary states. Physical properties are often referred to as observables. They are not modal properties. Quantifiable physical property is called physical quantity.

Physical properties are often characterized as intensive and extensive properties. An intensive property does not depend on the size or extent of the system, nor on the amount of matter in the object, while an extensive property shows an additive relationship. These classifications are in general only valid in cases when smaller subdivisions of the sample do not interact in some physical or chemical process when combined.

Properties may also be classified with respect to the directionality of their nature. For example, isotropic properties do not change with the direction of observation, and anisotropic properties do have spatial variance.

It may be difficult to determine whether a given property is a material property or not. Color, for example, can be seen and measured; however, what one perceives as color is really an interpretation of the reflective properties of a surface and the light used to illuminate it. In this sense, many ostensibly physical properties are called supervenient. A supervenient property is one which is actual, but is secondary to some underlying reality. This is similar to the way in which objects are supervenient on atomic structure. A cup might have the physical properties of mass, shape, color, temperature, etc., but these properties are supervenient on the underlying atomic structure, which may in turn be supervenient on an underlying quantum structure.

Physical properties are contrasted with chemical properties which determine the way a material behaves in a chemical reaction.

Physical qualities, actions, or things are connected with a person's body, rather than with their mind.

It occupies space and has its own mass. We can classify matter on the basis of physical properties and chemical properties. Liquids, gases and solids come under the physical properties. ... The force of attraction between the particles of matter is the interparticle force or the intermolecular force.

Physical nature of matter

Matter is made up of particles. Everything around us is made up of tiny pieces or particles. The particles of matter are constantly moving (they are in motion). The particles which make up matter are atoms and molecules.

All matter is particulate in nature. This basically means that between separate bits of matter there are spaces which contain no matter.

We can classify matter on the basis of physical properties and chemical properties. Liquids, gases and solids come under the physical properties. Crystalline and amorphous form are two forms of solids. Chemical properties of matter are classified on the basis of mixtures and pure substances.

So, a matter is anything that occupies space and has mass. All the buildings, the bridges, the atomic particles are all matter. Even our DNA, the air, the molecules inside our bodies, everything is matter. We know that matter comprises of particles. These particles are atoms and molecules.

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust. Reactivity is the ability of matter to react chemically with other substances.

Matter waves are a central part of the theory of quantum mechanics, being an example of wave–particle duality. All matter exhibits wave-like behavior. For example, a beam of electrons can be diffracted just like a beam of light or a water wave. ... It is also referred to as the de Broglie hypothesis.

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