Hot Water Expands Metal Cap for Easy Removal
Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. When a substance is heated, its constituent particles move around more vigorously and by doing so generally maintain a greater average separation. The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion and generally varies with temperature.
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Photo credit: © Phil Degginger / Alamy / Afripics
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Keywords: cap, contraction, expand, expanding, expands, expansion, expansion-contraction, hot, loosening, metal, removal, remove, water
