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A converging lens has a focal length of f = 26 cm. An object is placed 37 cm from the lens. Find the size of the image in cm if the object has a height of 6 cm. Express the answer with one decimal place.
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One cubic meter (1.00m^3) of concrete has a mass of 2.30E+3kg, and 1.00m^3 of copper has a mass of 8.92E+3kg. Find the radius of an concrete sphere whose mass is the same as that of an copper sphere of radius 1.28cm?
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