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Measure the mass of the solid object (rectangular blocks) using a top-pan balance.

Density is the amount of mass of a substance that fits in a given volume. Density is defined as:

Long periods of time are measured by a clock or a watch. Short times are measured by a stopwatch.

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Nulla eleifend vel risus eget ultricies. Praesent sed tortor sem. Vestibulum elementum, lectus id dignissim condimentum, nunc felis rhoncus enim; ac pretium tellus erat at sapien. Duis vitae vehicula libero. Vivamus vitae scelerisque ante.