why the ammeter and voltmeter has a circle representation

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What is the index of refraction of air?

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What is the difference between a lens and a mirror?

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What is Colours of bodies ?

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Can i work 240 volt 1400 watts 1 ton ac with 24 volt battery..! How..?

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a bullet of mass m travelling at velocity v has a kinetic energy of ½mv2 when it strikes a ballistic pendulum of mass 1000 grams. The kinetic energy of the twomasses moving together just after the moment of impact is about a thousand times smaller than ½mv2. What has most of the bullets initial kinetic energy beenconverted to?

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Why is lighting conductor used ?

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what happens to the period of a simple pendulum taken into a deep mine ?

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Explain the Dew Point ?

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When a glass cylinder is filled with water and a piece of thick paper is placed at the mouth and the cylinder is inverted, the paper dies not fall. Why ?

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Write Boyle’s law ?

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what does quantity of matter in an object denote

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