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Archimedes Principle : When a body is immersed either wholly or partially in a fluid at rest, the apparent loss of weight suffered by it is equal to the weight of the fluid displaced by the body.

Avogadro's Law : Equal volumes of all gases under the conditions of  the same temperature and pressure have the same number of molecules.

Black Body Radiation : An object that absorbs all radiation falling on it, at all wavelengths, is called a black body. When a black body is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature.

Boyle's Law : At constant temperature ,the volume of a given mass of a gas is inversely proportional to its pressure.

Charle's Law : At constant pressure ,the volume of a given mass of a gas is directly proportional to its absolute temperature.

Coloumb's Law : The force between two electric charge is directly proportional to the product of charge and inversely proportional to the square of the distance between them.

Centrifugal Pseudoforce pseudo-force on an object when it is moving in uniform circular motion. The "force" is directed outward from the center of motion.

Doppler's Principle : When the distance between the source of a wave and the observer increases due to relative motion between them,the frequency of the wave decreases and vice versa.

Kepler's Laws of Planetary Motion :Kepler's three laws of planetary motion -- formed in the early 17th century -- describe how planets orbit the sun. The first law, sometimes called the law of orbits, states that planets orbit the sun elliptically. The second law, the law of areas, states that a line connecting a planet to the sun covers an equal area over equal periods of time. In other words, if you're measuring the area created by drawing a line from the Earth to the sun and tracking the Earth's movement over 30 days, the area will be the same no matter where the Earth is in its orbit when measurements begin.
The third one, the law of periods, allows us to establish a clear relationship between a planet's orbital period and its distance from the sun. Thanks to this law, we know that a planet relatively close to the sun, like Venus, has a far briefer orbital period than a distant planet, such as Neptune.

Pascals's Law : 

  • First law- When pressure is applied to a liquid , the change in pressure is transmitted to every part of that liquid/fluid without any loss.Hydraulic machines work based on this law.
  • Second law- As the height increases ,atmospheric pressure decreases.

Ohm's Law : The current flowing through a conductor is directly proportional to electric potential across the conductor.

Black Body Radiation : A black body absorbs heat or radiates heat more quickly than any other body and re-radiates energy which is characteristic of this radiating system only, not dependent upon the type of radiation which is incident upon it. The radiated energy can be considered to be produced by standing wave or resonant modes of the cavity which is radiating.

Newtons Universal Law of Gravitation : Every body in the universe attracts every other body with a force, directly proportional to the product of their masses and inversely proportional to the square of the distance between them.  Laws of Thermodynamics :

  • First law- The amount of heat given to a system is equal to the sum of the increase in the internal energy of the system and the external work done.
  • Second law- It is impossible to construct a continuous self ­acting machine that can pump heat energy from a body at lower temperature to a body at higher temperature. 

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