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The force of friction due to air and water(and other fluids) is called fluid friction.
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synthetic fabrics and plastics are used to make umbrellas and raincoats because these do not absorb the water and the water that fall on it slides down
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A lubricant is a substance introduced between two moving surfaces to reduce friction between them. For example grease is applied between the moving parts of a machine.
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When we factorise an algebraic expression, we write it as a product of factors. These factors may be numbers, algebraic variables or algebraic expressions
The expression 6x (x - 2). It can be written as a product of factors. 2,3, x and (x - 2)
6x (x - 2). =2×3× x× (x - 2)
The factors 2,3, x and (x +2) are irreducible factors of 6x (x + 2).
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Structure of Human Ear:
The ears are the sense organs which help us in hearing sound. It consists of three compartments – outer ear, middle ear and inner ear.
- The outer ear consists of a broad part called pinna having a long passage called ear canal. At the end of the ear canal is a thin, elastic and a circular membrane called ear drum. It is also called tympanum. The outer ear contains air.
- The middle ear contains three small and delicate bone called hammer, anvil and stirrup. These bones are linked to one another. The middle ear transmits the amplified pressure variations received from the sound wave to the inner ear.
- In the inner ear, the pressure variations are turned into electrical signals by the cochlea. These electrical signals are sent to the brain via the auditory nerve, and the brain interprets them as sound.
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The Mercalli Intensity Scale was developed by the Italian volcanologist Giuseppe Mercalli in 1884 and expanded to include 12 degrees of intensity in 1902 by Adolfo Cancani. It was modified again by Harry O. Wood and Frank Neumann in 1931. It is known today as the Modified Mercalli Intensity Scale. The Modified Mercalli intensity scale (MM or MMI), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake.
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Fossilization refers to the regularly observed loss of progress in the attainment of a second language (L2) in linguistics as well as second language acquisition (SLA). This follows a stage where education occurred, despite usual exposure to and communication with the L2 and despite of any learner inspiration to continue.
Also, Fossilization refers to the process of replacement of an object's original minerals with others. The fossil will retain the same shape as the original but its chemical composition will be entirely different. Some types of fossilization are unaltered remains, per mineralization, recrystallization, and dissolution and replacement. Dissolution and replacement is when the water hits the bones, dissolves and the shape is still there.
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Plant cells are the basic unit of life in organisms of the kingdom Plantae. They are eukaryotic cells, which have a true nucleus along with specialized structures called organelles that carry out different functions.
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Yogita Ingle 7 years, 1 month ago
Tribal societies were absolutely different from those which existed in big cities. They did not follow the social rules and rituals, prescribed by the Brahmanas because they divided societies into numerous unequal classes. These societies were known as tribes. There was a unique bond of kinship among the members of each tribe.
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