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Light | Class 9 Physics Formula
Relation between the radius of curvature (r) and the focal length (f) of a spherical mirror for paraxial rays: r = 2f…
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Thermal Phenomena | Class 9 Physics Formula
Linear expansion of solid : Coefficient of linear expansion (α) = L_t-L_o\over L_ot[\katex] or Lt = L0 (1 + αt) Relation among…
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Chemical Calculation | Class 9 Physics Formula
Law of conservation of mass : Mass of reactants = Mass of products Molecular weight and vapour density : Molecular weight of…
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Behaviour of gases | Class 9 Physics Formula
Boyles’ law : For a fixed mass of gas at a constant temperature, P1V1= P2V2 = K = constant Charles’ law : For…
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Hindi Project on महावीर प्रसाद दिवेदी (Mahavir Prasad Divedi) | Class 9 Hindi
आचार्य महावीर प्रसाद द्विवेदी (1864–1938) हिन्दी के महान साहित्यकार, पत्रकार एवं युगप्रवर्तक थे। उन्होंने हिंदी साहित्य की अविस्मरणीय सेवा की और अपने…
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Madhyamik Project on Industrial Revolution | Class 9 History
Introduction The Industrial Revolution was a period of great change in the way goods were produced. It began in Great Britain in…
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Chapter 9 – Map and Scale | Free Book PDF
Book Name : School Geography Subject : Geography Class : 9 (Madhyamik/WB) Publisher : Bengal Book Syndicate (P) Ltd Chapter Name :…
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Chapter 8 – West Bengal | Free Book PDF
Book Name : School Geography Subject : Geography Class : 9 (Madhyamik/WB) Publisher : Bengal Book Syndicate (P) Ltd Chapter Name :…
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Chapter 7 – Resources of India | Free Book PDF
Book Name : School Geography Subject : Geography Class : 9 (Madhyamik/WB) Publisher : Bengal Book Syndicate (P) Ltd Chapter Name :…
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Chapter 6 – Hazards and Disasters | Free Book PDF
Book Name : School Geography Subject : Geography Class : 9 (Madhyamik/WB) Publisher : Bengal Book Syndicate (P) Ltd Chapter Name :…