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Q. Who discovered cosmic ray?
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Q. The speed of light in water is ¾ of that in air. What is the refractive index of water...
Q. The SI unit of luminous emittance is
Q. Hydraulic machines work under the Principle of :
Q. The science dealing with the study of phenomena at very low temperature is known as
Q. Which of the following is good nuclear fuel?
Q. It is dangerous to observe Solar eclipse with naked eyes because
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