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Shivam Tomar 8 years, 2 months ago
Varun Banda 8 years, 2 months ago
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
Posted by Dimpy Baweja 8 years, 2 months ago
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Deepak Kumar 8 years, 2 months ago
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Varun Banda 8 years, 2 months ago
Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as humanbeings , plants, fungi, and insects.
Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle. Prokaryotes include two groups: bacteria and another group called archaea.Ex:Bacteria.Amoeba.
Posted by अभिषेक सिंह 8 years, 2 months ago
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Varun Banda 8 years, 2 months ago
Excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life is called Eutrophication.
Posted by Neraj Rajput 8 years, 2 months ago
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Varun Banda 8 years, 2 months ago
There are many different types of water pollution and all have a different adverse effect on the environment. Heavy metals from industrial processes can accumulate in nearby lakes and rivers. These are toxic to marine life such as fish and shellfish, and can affect the rest of the food chain.
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Kritika Trehan 8 years, 2 months ago
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
Posted by Rajkumar Yadav 8 years, 2 months ago
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Varun Banda 8 years, 2 months ago
Aqua regia is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals.
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Kritika Trehan 8 years, 2 months ago
Reproduction is the biological process by which new individual organisms – "offspring" – are produced from their "parents". Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction
Posted by Diva Divyanshi 8 years, 2 months ago
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Kritika Trehan 8 years, 2 months ago
Humans can generally sense sounds at frequencies between 20 and 20,000 cycles per second, or hertz (Hz)—although this range shrinks as a person ages. Prolonged exposure to loud noises within the audible range have long been known to cause hearing loss over time. But establishing the effect of sounds with frequencies under about 250 Hz has been harder. Even though they’re above the lower limit of 20 Hz, these low-frequency sounds tend to be either inaudible or barely audible, and people don’t always know when they’re exposed to them.
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Afan Shariff 8 years, 2 months ago
3Thank You