GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Mass measurement, Photo 1 of 2. A small digital scale is used to measure the mass of 2 paper clips (Photo 1) and the mass of many packing peanuts (Photo 2). While the mass is the same (1.0 gram), packing peanuts occupy much larger volume because of their lower density, as compared to the paper clips (plastic-covered steel). Photo 1 of 2.
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