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NCERT Class 10 Maths Solutions: Circles Question: If tangents PA and PB from a point P to a circle with centre O are inclined to each other an angle of 80°, then ∠POA is equal to ______. A. 50° B. 60° C. 70° D. 80° E. 40° Concept in a Minute: Tangents from an external […]

NCERT Class 10 Maths Solutions: Arithmetic Progressions Question: Choose the correct choice in the following and justify: 30th term of the AP: 10, 7, 4, …, is ______. A. 97 B. 77 C. –77 D. – 87 Concept in a Minute: Arithmetic Progression (AP): A sequence of numbers such that the difference between the consecutive

NCERT Class 10 Maths Solutions: Areas Related to Circles Question: A chord of a circle of radius 12 cm subtends an angle of 120° at the centre. Find the area of the corresponding segment of the circle. [Use π = 3.14 and $\sqrt{3=1.73}$ ] Concept in a Minute: The area of a segment of a circle is the

Human Impact on the Environment Human Impact on the Environment: Deforestation, Pollution, Unsustainable Practices, Conservation Efforts Definition Human impact on the environment refers to the detrimental changes humans have made to the natural world. This encompasses a wide range of issues, including deforestation, pollution of air, water, and land, unsustainable resource consumption, climate change, and

Biogeochemical Cycles: Essential Earth Processes Definition Biogeochemical cycles are pathways through which chemical substances move through both biotic (living) and abiotic (non-living) components of the Earth’s systems. These cycles are crucial for sustaining life as they transport essential elements like water, carbon, nitrogen, and oxygen. Explanation Biogeochemical cycles involve the cycling of elements through different

Biodegradable vs. Non-Biodegradable: Examples & Impacts Definition Biodegradable substances are materials that can be broken down by natural processes, primarily by the action of microorganisms (bacteria, fungi) and other living organisms, into simpler substances like carbon dioxide, water, and organic compounds. Non-biodegradable substances, on the other hand, cannot be broken down by these natural processes

Environmental Challenges Definition Environmental problems refer to the detrimental impacts of human activities on the natural environment. This includes pollution (air, water, soil), deforestation, the greenhouse effect, and global warming. These problems degrade the quality of air, water, and soil, threaten biodiversity, and disrupt Earth’s climate system. Explanation Pollution: The contamination of the environment with

Waste Management: A Comprehensive Guide Definition Waste management is the process of collecting, transporting, processing, recycling, or disposing of, managing and monitoring of waste materials. It encompasses a range of methods aimed at minimizing the harmful effects of waste on human health and the environment. Explanation Waste can be broadly classified into two categories: Biodegradable

Ozone Layer Depletion: Causes, Effects & Solutions Definition The ozone layer is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet (UV) radiation. Ozone ($O_3$) is a molecule made up of three oxygen atoms. Ozone depletion refers to the thinning of the ozone layer, leading to a decrease in the amount of

Ecosystems: Structure and Function Definition An ecosystem is a community of living organisms (biotic factors) interacting with each other and their physical environment (abiotic factors). It’s a self-sustaining unit where energy flows and nutrients cycle. Explanation Ecosystems encompass all the organisms in a specific area and their non-living surroundings. This includes diverse environments like forests,