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Preeti Dabral 3 years ago
माँग के नियम के अनुसार यदि अन्य तत्व समान रहें तो एक वस्तु की माँगी गई मात्रा तथा उस वस्तु की कीमत में विपरीत संबंध होता है। अर्थात् वस्तु की कीमत बढ़ने पर वस्तु की माँगी गई मात्रा में संकुचन आ जाता है तथा वस्तु की कीमत घटने पर वस्तु की माँगी गई मात्रा विस्तृत हो जाती है।
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Preeti Dabral 3 years ago
वर्षा जल संग्रहण :- यह एक तकनीक है जिसमें वर्षा जल को खाली स्थानों, घरों में टैंक में, बेकार पड़े कुएँ में भरा जाता है। बाद में इसका प्रयोग किया जाता है। पर्वतीय क्षेत्रों में ‘गुल' तथा ‘कुल' जैसी वाहिकाओं से नदी की धारा का रास्ता बदलकर खेतों की सिचाई।
भारत के विभिन्न भागों में वर्षा जल संग्रहण की दी विधियाँ :-
- राजस्थान में पीने का जल एकत्रित करने के लिए छत वर्षा जल संग्रहण आम तकनीक है। पश्चिम बंगाल में बाढ़ के दौरान बाढ़ जल वाहिकाएँ बनाते हैं।
- शुष्क तथा अर्ध शुष्क क्षेत्रों में वर्षा जल एकत्रित करने के लिए गड्ढ़ों का निर्माण।
- नदी पर बाँध बनाकर इससे अनेक प्रकार के उद्देश्यों को पूरा करना, बहुउद्देशीय नदी घाटी परियोजना कहते हैं।
- जल विद्युत उत्पादन
- सिंचाई
- घरेलू व औद्योगिक जल आपूर्ति
- नौचालन व पर्यटन
- बाढ़ नियंत्रण
- मछली पालन
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Preeti Dabral 3 years ago
An electric motor is a device that converts electrical energy into mechanical energy.
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Preeti Dabral 3 years, 1 month ago
Evaporation is the process by which a liquid turns into a gas. It is also one of the three main steps in the global water cycle.
Posted by Anirudh Saini 3 years, 1 month ago
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Preeti Dabral 3 years, 1 month ago
Vijay Singh concluded that the ghost would not be a worthy opponent to him because the ghost had started to doubt his ghostly powers. He then told the ghost that there was no point wrestling with a weakling, and the ghost accepted his defeat very easily as he had other plans to kill Vijay.
No, he was not fair in his judgement of the ghost because he had overpowered him through wrong means. Vijay had fooled him into believing that he was a weakling who could not squeeze fluid or salt out of a rock while he was a pahalwan with extraordinary strength.
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Preeti Dabral 3 years, 1 month ago
Bromine water test can be used to differentiate between saturated and unsaturated hydrocarbons. The addition of bromine (Br2) gives addition reactions with unsaturated compounds (like alkenes and alkynes).
When bromine water is added to an unsaturated compound, then bromine gets added to the unsaturated compound and the red-brown colour of bromine water is discharged. So, if an organic compound decolourises bromine water, then it will be an unsaturated hydrocarbon (containing a double bond or a triple bond), but saturated hydrocarbon (alkenes) do not decolourise bromine water.
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