Explain heat treatment. Why and how is it done?
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Explain what is the rectilinear propagation of light?
How does a sound wave travel in air?
Explain the Liquids ?
the weight of the body at the centre of the earth is
What is Colours of bodies ?
Tell me how many neutrons and how many protons are present in a single deuterium nucleus?
What is a galvanometer and its use?
What is Oxidation ?
Explain what is the ray of light?
Explain what is time?
x- rays travel with the velocity of
Explain the Air Pressure Machines ?