Polystyrene floating, image 1 of 2
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Polystyrene floating, image 1 of 2
Polystyrene floating on water. Image 1 of 2. Polystyrene floats as its density (mass in a given volume) is less than that of water. The amount of polystyrene below the water line has a volume equal to the volume of water with a mass equal to that of the entire polystyrene block. Objects with the exact same density as water displace the same volume. If they are denser, the volume of water displaced is greater than the objects volume, and it sinks. Image A350/197 shows the block pushed under the waters surface, showing it displacing a volume of water equal to its volume. Note the water level at just over 700 millilitres here
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6274225
© ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY
Buoyancy Buoyant Demonstrating Demonstration Dense Density Effects Floating Liquid Measuring Cylinder Physical Effect Poly Styrene School Laboratory Physical
EDITORS COMMENTS
This print captures the fascinating phenomenon of polystyrene floating on water. In this first image of a series, we witness the remarkable buoyancy of polystyrene due to its lower density compared to that of water. The volume of polystyrene below the water line is equivalent to the volume of water displaced by the entire block's mass. The concept illustrated here is based on Archimedes' principle, which states that objects with identical density as water displace an equal volume. However, if an object is denser than water, it will displace a greater volume and sink instead. Image A350/197 showcases an intriguing demonstration where the polystyrene block has been pushed beneath the surface, revealing how it displaces precisely its own volume in water. Notably, observe the precise measurement indicated at just over 700 milliliters in this photograph. This educational snapshot was taken in a school laboratory during a physical experiment aimed at demonstrating principles related to density and buoyancy. It serves as a powerful visual aid for physics lessons or discussions about physical effects and measurements using liquid mediums.
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