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an object is placed at a distance of 20cm from concave lens of focal length 20cm . at what distance is the image formed from the lens?also find the magnification of the image
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Ahill is made of rock particles of different sizes. which of these agents of erosion probably caused the hill to form?
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Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a texture.
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Mosses, lichens and shrubs can be found where in russia? a.grasslands b.mountain regions c.coastal plains d.siberian tundra
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Which layer surrounds the center of the earth? a: crust b: core c: mantle
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an object is placed at a distance of 20cm from concave lens of focal length 20cm . at what distance...
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