Thermodynamic Scale of Temperature :- ABSOLUTE

Thermodynamic Scale of Temperature :- ABSOLUTE            An absolute temperature scale is independentof the properties of the substances.The temperatures are always measured by making use of properties e.g. thermal expansion of liquids and gases, the variation of thermo e.m.f. and electrical resistance with temperature etc.            Lord kelvin from the study of the effeciency of...

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De broglie wavelength equation (De-Broglie equation )

De Broglie Wavelength Formula         In some situations, light behaves like a wave, while in others, it behaves like particles. The particles of light are called photons, and they can be thought of as both waves and particles. Louis de Broglie (1892-1987) developed a formula to relate this dual wave and particle behavior. It can also be applied to other particles, like electrons and protons. The formula relates the wavelength...

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Home rothery's rules and regulations (physics)

Hume-Rothery rules:- HUME-ROTHERY'S RULES:-               In the course of an alloy development, it is frequently desirable to increase the strength of the alloy by adding a metal that will form a solid solution. In the choice of such alloying elements, a number of rules govern the for- mation of substitutional work of Hume-Rothery. Unfortunately, if an alloying element is chosen at random, intermediate...

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Types of SAND in civil Engineering

Types of sand according to size:- GREEN SAND DRY SAND LOAM SAND FACING SAND BACKING SAND SYSTEM SAND PARTING SAND CORE SAND Define all types SAND:_-           GREEN SAND- It is a mixture of silica sand with 18 to 30 percent clay, having a total water content 6 to 8 percent. The clay and water furnish the bond for green sand. It is fine, soft, light, and porous. Being damp when squeezed in the hand, it retains...

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Stress and strain. Hook's Law

DEFINE STRESS AND STRAIN:- Stress-              When some external forces are applied to a body, it offers resistance to these forces. The magnitude of this resisting force is numerically equal to the applied forces. This internal resisting force per unit area is called stress. Therefore, stress can be defined as the intensity of internal forces resisting change in the shape of the body. It is calculated by simply...

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