What is the ray of light?
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What is Alum?
Explain the difference between a lens and a mirror?
Explain the Electric dynamo ?
What is Fahrenheit thermometer ?
Why is it easier to lift a stone in water than in air ?
what is meant patch cards..
Explain about Magnetic mines
Dust is removed from a carpet, if we strike it with a stick, why ?
What is the homogenous?
For two objects separated by a distance d, if the mass of one of the objects is doubled, what will happen to the gravitational attraction between them?
how many neutrons and how many protons are present in a single deuterium nucleus?
What is Amalgam ?