Razor blade floating on surface of water

Razor blade floating on surface of water

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Credit: PETER APRAHAMIAN/SCIENCE PHOTO LIBRARY.

Caption: Surface tension: a razor blade appears to float on a volume of water. Surface tension effects at the water- air interface cause the surface to behave like a stretched, elastic membrane, which exerts an upwards force on the razor blade. The blade (which is more dense than water) may be considered as sitting in a depression formed in the surface.

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Keywords: effects, liquid, physical effect, physics, razor blade, surface tension

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