Tell me what is radium used for?
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Explain refraction?
Explain the Uniform Velocity ?
when taken to the top of a mountain, a clock will go fast or go slow or no change or stop ?
which has the highest elasticity?
What is sound?
What is the heterogenous?
How many femtometers are in a nanometer?
Why ate screws preferred to nails in holding the two pieces of wood ?
What are the 4 results of the photoelectric effect experiments? : quantum physics
How does birds specially adopted to flight ?
Explain about Bessemer?
At what temperature does the filament of electric bulb glows ?