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Gaurav Seth 4 years, 3 months ago
Tut was a boy king of Egypt. He belonged to a very powerful dynasty which ruled for centuries over Egypt. Young Tutankhaten changed his name to Tutankhamun but he was popularly known as Tut. He ruled over his kingdom for about nine years. He died unexpectedly giving rise to many doubts and speculations. He was the last heir of his powerful family.
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Yogita Ingle 4 years, 3 months ago
वह प्रक्रिया जिसमें गैस संघनित होकर (ठंडा) द्रव में परिवर्तित हो जाता है संघनन कहलाता है |
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Yogita Ingle 4 years, 3 months ago
भौतिकी में किसी पदार्थ के इकाई आयतन में निहित द्रव्यमान को उस पदार्थ का घनत्व (<wbr />डेंसिटी) कहते हैं।
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Gaurav Seth 4 years, 3 months ago
दो विभिन्न पदार्थों के कणों का स्वत: मिलना विसरण कहलाता है |
“किसी ठोस, द्रव्य या गैस के अणुओं या आयनों का अधिक सांद्रता वाले क्षेत्र से कम सांद्रता (Concentrations) वाले क्षेत्र की ओर गमन विसरण कहलाता है।”
अगरबत्ती की खुश्बू का पूरे कमरे में फैल जाना, शक्कर का पानी में घुलना, लाल दवा (KMnO₄) का पानी में डालने पर उसका जल में घुलकर फैलना, प्रकाश संश्लेषण की क्रिया में CO₂ को वातावरण (environment) से लेना तथा O₂ का निकलना आदि सभी विसरण (diffuse) के उदाहरण हैं। गैस, द्रव तथा ठोस पदार्थ के कण (particle) एक-दूसरे में विसरित (diffuse) होते हैं। विसरण की दर गैसों में सबसे अधिक, द्रवों में गैसों से कम तथा विलेय (ठोस) को विलायक (द्रव) में घोलने पर द्रवों में अपेक्षाकृत कम होती है।
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Ajeet Singh 4 years, 2 months ago
2Thank You