What evidence is there supporting the big bang theory?
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Why is battery used in a motor car ?
the hardest substance available on earth
Explain planck’s hypothesis or what the postulates of planck’s quantum theory? (Or) what are the assumptions of quantum theory of black body radiation? : quantum physics
Describe the main process involved in the manufacture sugar. What is the main bi-product of sugar industry and to what use as put in Bihar ?
Explain how does the elevation and air pressure affect the boiling point of water?
What is the Cement ?
the the domestic consumption of electricity is calculated in
When a glass cylinder is filled with water and a piece of thick paper is placed at the mouth and the cylinder is inverted, the paper dies not fall. Why ?
Explain reflection of light?
A bird sitting on a naked wire carrying current feels quite safe, but when the wire between his feet is cut and joined by a very long loop of wire, the bird dies. Why?
whether man or women came first on earth
Explain the Optical Medium ?