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State the Pigeonhole Principle. Prove: From numbers 1 to 8, any selection must include two that sum to 9

Biochemical production of hydrogen involves utilizing biological systems such as microorganisms or enzymes to generate hydrogen from organic matter. This method is considered sustainable and environmentally friendly, especially when low-cost biomass or waste materials are used. It relies on natural…

Hydrogen is a clean and efficient energy carrier with a wide range of applications in transportation, electricity generation, industrial processes, and energy storage. However, hydrogen does not exist freely in nature in significant quantities—it must be produced from hydrogen-rich compounds.…

A floating dome type biogas plant is a widely used design in India for small to medium-scale biogas production. It is particularly popular in rural and agricultural areas due to its simplicity, ease of operation, and efficient handling of animal…

Biogas is a renewable source of energy that is produced through the anaerobic digestion of organic materials by microorganisms in the absence of oxygen. The production and composition of biogas are largely dependent on the type of biomass feedstock used.…

BME654B – RENEWABLE ENERGY POWER PLANTS Solved Model Question Paper with answers Module 1 1.a] Discuss the need for non-conventional energy sources. 1.b] List the advantages and disadvantages of renewable energy resources. OR 2.a] With schematic representation, explain the mechanism…

Rainwater harvesting (RWH) is the practice of collecting and storing rainwater for various purposes such as irrigation, drinking, household use, and industrial processes. It is an ancient technique that has gained renewed attention in recent times due to rising water…

Contour trenching is a widely used soil and water conservation technique employed especially in hilly and sloped areas. It involves the construction of trenches along the contour lines of a slope—lines of equal elevation across a hill. These trenches intercept…

Water pollution is a serious environmental issue that affects both rural and urban areas. It occurs when harmful substances contaminate water bodies such as rivers, lakes, groundwater, and reservoirs. These pollutants degrade water quality, harm aquatic life, and pose severe…

Explain the feasibility of implementing rooftop rainwater harvesting in rural households Answer:- Rooftop rainwater harvesting (RRWH) is a method of collecting and storing rainwater from building rooftops for various uses such as drinking, cooking, irrigation, and sanitation. It is a…