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CBSE Class 11-science Answered

molecular motion
Asked by Venkat phy lect | 13 Dec, 2013, 08:00: PM
answered-by-expert Expert Answer
The evidence of molecular motion could be understood with the help of Brownian motion.
 
When talcum powder (say for example) is spread over still water and is observed under a microscope, then it is observed that the powder particles are in constant motion. This motion in would violate the law of conservation of energy and momentum unless something from water provides energy to the powder particles.
 
The molecules of water would be in constant vibration which would provide the energy to powder particles, and hence this provides an evidence about molecular motion.
Answered by Romal Bhansali | 16 Dec, 2013, 03:53: PM

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CBSE 11-science - Physics
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