39boss, i asked na explain fully. please
two air bubbles in water
a]attract each other
b]repel each other
c]do not exert any force on each other
d]may attract or may repel depending on the distance between them
please try to explain solution fully please [176]
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6 Answers
1yaar it is out of syllabus .. proving is based on the fact of anti gravitational force ...
24it wont use anti gravitational force
It is a general rule that 2 particles(or bodies) of same material in a medium attract each other.....
and particles of different material in a medium repel each other.....
(from Hamaker rule....not worth understanding in detail at this levell)
If u want explaination::think about vanderwaal forces............
or read a good higher level book on science of interfaces
1here is a proof by -ve mass ...
F = G (-m)(-m)/r2 .. mass of liq is missing and mass of air is not to be considered ...
F turns out to be +ve so .. attractive force exists ...
9this q was already asked here
the centre of mass of liquid system attracts the bulk but not the air bubble so they are pushed away
ans is b