“The Knowledge Library”

Knowledge for All, without Barriers…

An Initiative by: Kausik Chakraborty.

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Physics

What is Kelvin?

To understand heat, we have to get down to the molecular level. Heat is energy. It’s caused by the movement of atoms. The faster an object’s atoms move, the hotter it

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How Can a Voice Break Glass?

The laws of physics show that every piece of glass — actually, every material on Earth — has a natural resonant frequency. That frequency is the speed at which it will

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How Do Mirrors Work?

Basically, anything with a smooth surface that reflects almost all of the light that hits it — with only very little light absorbed or scattered

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Formula

Work = force × distance कार्य = बल × दूरी 2. Energy = force × distance ऊर्जा = बल × दूरी 3. Speed = distance

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Units of Measurements

Quantity – Units (S.I.) ●Length – Metre ●Time – Second ●Mass – Kilogram ●Area – Square meter ●Volume – Cubic meter ●Velocity – Metre/second ●Acceleration

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What is an Optical Illusion?

Optical illusions are images or pictures that we perceive differently than they really are. Put another way, optical illusions occur when our eyes send information to our brains that tricks

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How Does 3D Work?

3D stands for three-dimensional. “Regular” movies are 2D, or two-dimensional. What are dimensions, and what’s the difference? Dimensions are properties of space. They refer to extension in a particular

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What Does a Barometer Measure?

Can you feel the pressure? It’s around you…all the time…everywhere you go. What is it? Atmospheric pressure — often referred to simply as air pressure — is the constant force exerted on you

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What is Static Electricity?

Everything in the world consists of tiny particles called “atoms.” Atoms contain even tinier particles called “protons,” “neutrons” and “electrons.” Most atoms are neutral, which

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भौतिक राशि physical quantities अन्य भौतिक राशियों से संबंध

क्षेत्रफल area लंबाई × चौड़ाई   आयतन volume लंबाई× चौड़ाई×ऊंचाई   द्रव्यमान घनत्व density द्रव्यमान/आय आवृत्ति frequency 1/आवर्तकाल   वेग velocity विस्थापन/समय   चाल speed

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