Solids are considered to be the strongest state of matter we find on our planet, and have the following properties: â— Solid particles are held together by strong forces, so they cannot be squashed or flattened. â— Solid particles cannot shift easily from place to place, but have a fixed shape. â— In solids, constituent particles are arranged in a regular and distinct sequence. â— Strong forces bind the particles of solids together so that solids do not flow like liquids. â— Constituent particles of a solid can vibrate in a fixed position.
Behavior of Liquids
There are many different kinds of liquids, but they generally share the following behavior: â— Evaporation: Since a liquid’s molecules are in continuous motion, they collide with each other and their container’s edges. These collisions transfer energy from one molecule to the next. If enough energy is transmitted to a molecule at the liquid’s surface, it gradually overcomes the surface tension that binds it to the rest of the liquid. When surface particles gain adequate kinetic energy then they escape, and evaporation occurs. When particles with higher kinetic energy escape, the remaining particles have lower mean kinetic energy, which causes the cooling of the liquid. This effect is known as evaporative refrigeration.
â— Cohesion: Cohesion is the tendency to attract the same kind of particles to one another. This unified “stickiness” makes up for a liquid’s surface friction. Surface tension is a very thin “layer” of particles that are drawn more intensely to each other than to the other particles surrounding them. If these attractive forces remain undisturbed, they can be remarkably strong. Cohesive forces account for the liquids’ tendency to form spheres, the shape with the least amount of surface area. These liquid spheres form the classic rain drop shape under the force of gravity.
Behavior of Solids
One of the important behaviors of solids is their tendency to exhibit elasticity.
â— Elasticity: All materials have an elastic limit beyond which they will start to lose their ability to exhibit perfect elastic behavior and deform when continuous stress is applied. Plastic deformation, by definition, is the non-reversible deformation in rigid structures by applying forces.
Behavior of Solids
Behavior of Solids
Starting at the atomic level, solids are composed of particles (atoms, ions, or molecules). Those particles get displaced when an external force is applied, resulting in a strong deformation. When the propagation of the deforming force is halted, the atoms are guided by interatomic forces to restore their state of equilibrium. This is known as elasticity.
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