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Q. Hydraulic machines work under the Principle of :
The hydraulic system works on the principle of Pascal's law which says that the pressure in an enclosed fluid is uniform in all the directions.
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Q. A soap bubble shows colours when illuminated with white light. This is due to
Q. Which of the following sets are the best insulators?
Q. Purity of a metal can be determined with the help of
Q. If electric resistance is to be decreased, then the number of resistances should be connected in
Q. Materials for rain proof coats and tents owe their water proof properties to
Q. Find the acceleration (in m/s2) of a body which accelerates from 25 m/s to 30 m/s in 10 seconds
Q. The image formed on the retina of the eye is
Q. Which one of the following explains that all the galaxies are receding from us
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