Question

what is thermal expansion? Give one example.​

Answer 1

⚘ Thermal expansion is caused by heating solids, liquids or gases, which makes the particles move faster or vibrate more (for solids). This means that the particles take up more space and so the substance expands.

Example:

• If you have ever tried to unscrew a stuck lid off a glass jar, you'll appreciate this expansion effect. Simply run some hot water over the metal lid for a few seconds to heat the lid up. This will make the lid expand slightly and it should then be easier to unscrew.

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