Physics
Grade-9
Easy
Question
When the temperature of a liquid decreases, its constituent particles ____.
- Vibrate more vigorously
- Move randomly at increased speeds
- Move randomly at decreased speeds
- Cover a greater volume than before
Hint:
As the temperature of a liquid falls the kinetic energy reduces as well
The correct answer is: Move randomly at decreased speeds
- As the temperature of a liquid falls, the speed of its molecules slows down. Since the molecular speed slows down, the kinetic energy reduces as well, thereby increasing intermolecular attraction of the liquid
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