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Posted by Bilal Khan 5 years ago
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Posted by Anand Tiwari 5 years ago
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Devendra Kumar Nigam 4 years, 11 months ago
Posted by Anand Tiwari 5 years ago
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Yogita Ingle 5 years ago
वह प्रक्रिया जिसमें गैस संघनित होकर (ठंडा) द्रव में परिवर्तित हो जाता है संघनन कहलाता है |
Posted by Anand Tiwari 2 years, 8 months ago
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Yogita Ingle 5 years ago
भौतिकी में किसी पदार्थ के इकाई आयतन में निहित द्रव्यमान को उस पदार्थ का घनत्व (<wbr />डेंसिटी) कहते हैं।
Posted by Anand Tiwari 5 years ago
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Posted by Anand Tiwari 5 years ago
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Gaurav Seth 5 years 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।
Posted by Anand Tiwari 5 years ago
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Gaurav Seth 5 years ago
(1) यह वस्तु में उपस्थित कुल पदार्थ की मात्रा होती है | द्रव्यमान वस्तु के जड़त्व की माप होती है |
(2) वस्तु का द्रव्यमान प्रत्येक स्थान पर अचर रहता है |
(3) इसका मात्रक किलोग्राम (kg) है |
(4) यह भौतिक तुला से मापा जाता है |
(5) यह एक अदिश राशि है |
Posted by Lehar Sharma Lehar Sharma 5 years ago
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Posted by Harsh Kumar 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
The word polynomial is derived from the greek words ‘poly’ means ‘many’ and ‘nominal’ means ‘terms’, so altogether it said “many terms”.
Polynomials are the algebraic expressions which consist of variables and coefficients. Variables are also called indeterminates. We can perform the arithmetic operations such as addition, subtraction, multiplication and also positive integer exponents for polynomial expressions but not division by variable. An example of a polynomial with one variable is x2+x-12. In this example, there are three terms: x2, x and -12.
Posted by Lucky Yadav 5 years, 1 month ago
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Posted by Koinota Hojai 5 years, 1 month ago
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Meghna Thapar 5 years, 1 month ago
Historically, precious metals were important as currency but are now regarded mainly as investment and industrial commodities. Gold, silver, platinum, and palladium each have an ISO 4217 currency code. The best known precious metals are the coinage metals, which are gold and silver. Though Gold is quite abundant, because of its high popularity it becomes very valuable. ... Another reason due to which gold works well in terms of value is because gold does not readily oxidize thus, it maintains a constant weight. Other metals, such as iron rusts and copper gets oxidized.
Posted by Anshika Singh Singh 5 years, 1 month ago
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Posted by Bhavna Jha 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
Photosynthesis meaning :
- The process by which plants make their own food in the presence of sunlight , carbon-dioxide present in air , water , minerals and chlorophyll present in leaves is termed as photosynthesis .
Posted by Anklr Tewari 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
(a + b)3 = a3 + 3a2b + 3ab2 + b3 ; (a + b)3 = a3 + b3 + 3ab(a + b)
Posted by Bhupinder Singh 5 years, 2 months ago
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Yogita Ingle 3 years, 9 months ago
• Democracy believes in a government of the people for the people. Non-democracy is completely against this idea.
• In a democratic state, the people can choose their leader. They are also entitled to have their say in the legislation of the state. In a non-democratic state, the people cannot choose their leaders and neither do they have a say in the legislation of the land.
• Democracy is a specific kind of government. Many government systems fall under the umbrella of non-democracy.
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Thakur Madhav Singh 5 years ago
1Thank You