ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Equal masses of different materials. From left to right are 10 grams of brass, 10 grams of water (in a glass tube) and 10 grams of balsa wood. They are different sizes are the materials have different densities. Balsa wood, being less dense than water, will float. Brass, being more dense, will sink.
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