Q. Thermal expansion is the tendency of matter to __________ in volume when heated.
गर्म होने पर पदार्थ का आयतन __________ होने की प्रवृत्ति को ऊष्मीय विस्तार कहते हैं।
Explanation
Thermal expansion occurs because, as matter is heated, its particles gain kinetic energy and vibrate more vigorously. This increased movement causes the particles to occupy more space, leading to an increase in volume. This effect is observed in solids, liquids, and gases, though it is most significant in gases.
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