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Waveform Audio File Format  |  1995-06-29  |  233.5 KB  |  1 channel  |  22,050 sample rate  |  21 seconds  |  [TEXT/LMAN]
Transcription: An object made of metal is usually much heavier than a wooden one with the same volume. This is because metal has a greater density than wood. The density of a substance depends on the mass of a given volume of the substance. The metal object contains heavier, more tightly packed atoms than the wooden object. Therefore it has a greater density.