Which particles/ rays do radioactive substances emit?
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The lowest frequency that determines the pitch of a musical note is most commonly called the?
Explain the Machines ?
How is the bullet in a man?s body located ?
When is fluorescence strong?
How is A.C. converted into D.C ?
What is Metals ?
how does a medicine is filled in dropper
Who first detected radio waves?
what is gravitational force?
Why does the specific gravity of milk increase, when cream is removed from the milk ?
Explain nuclear fission?
Explain about Magnetic mines