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WORK AND ENERGY %E0%A4%95%E0%A4%BE%E0%A4%B0%E0%A5%8D%E0%A4%AF %E0%A4%A4%E0%A4%A5%E0%A4%BE %E0%A4%8A%E0%A4%B0%E0%A5%8D%E0%A4%9C%E0%A4%BE PART 2 SCIENCE POLYTECHNIC