What is radium used for?
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What is supersonic?
Why does the reflection of objects seen on a cheap looking glass give distorted images ?
How can you save the sea from oil and sound polution?
Why is diamond cut to make if brilliant ?
Explain the branches of physics?
Why does a piece of ice make drink colder?
how much mercury overflows when a glass vessel filled to the brim with 50 cubic centimeter of mercury 15°C is heated to 75°C of glass?
Explain what does gravitational force depend on?
Tell me why is n-type conductor is neutral?
What seven colors appear to be white when mixed together?
What is the wavelength of sound in air?
explain the proper definition of light?