Explain the universal law of universal gravitation?
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Two parallel beams of electrons are moving in the same direction. Does they repel or attract each other?
Why does the specific gravity of milk increase, when cream is removed from the milk ?
Explain the Mass and Weight ?
What is a Coal ?
In Einstein's mass energy relation E=mc2 why velocity of light is used and never ordinary velocities?what is the exact explanation?
This person established the one fluid theory of electricity and performed some of the first investigations into electrical grounding and insulation:
What is the musical sound?
What is amplitude?
How much should be the minimum size of the ordinary mirror, so that and observer standing at the centre of room is able to see the whole of the height of the wall behind him ?
why we need complex no. in physical world?
How is soda in a glass sucked up with the help of a straw ?
What is optical medium?