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1
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a balance for finding the weight of an object submerged in water in order to determine the upthrust on it and thus determine its relative density
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2
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an Italian astronomer, physicist, and mathematician
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3
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a clock that uses a pendulum, a swinging weight as its timekeeping element
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4
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A Greek philosopher and scientist
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5
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The creator of the heliocentric system
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6
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an optical instrument designed to make distant objects appear nearer
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7
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an instrument that is used to perform arithmetical calculation and geometric operations easily
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