Explain what is the heterogenous?
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Explain what is photometry?
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Why does the moon shine, evening though it has not light of its own ?
What is a neutron?
Name the metal that burns in oxygen with a dazzling white flame
What do you mean by diffraction and what is/are the proper condition/conditions for it?
Why in cold countries, the water at the surface freezes and in the inner portion it is in the sate of water ?
Why is there a change in the weight of a body if the earth changes its speed ?
How does birds specially adopted to flight ?
How dies fanning produce a sense of coolness to the face ?
When a string is placed on a slab of ice, the string passes through it.Why ?
is photocell can be used as photodiode