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Q. A photo electric cell converts
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Q. Fish can survive in a frozen lake because
Q. What is the range of masses involved in the study of Physics?
Q. According to Einstein's mass-energy relation
Q. The main source of hydro-electric power station is ?
Q. Water has maximum density at............
Q. The gas thermometers is more sensitive than the liquid thermometre because gases
Q. The intensity ratio of waves is 25: 9. What is the ratio of their amplitudes
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