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Home / Doubts and Solutions/NEET/Physics

How to solve 

Asked by amitjena226 21st December 2017, 10:41 PM
Answered by Expert
Answer:
begin mathsize 24px style L e t space a t m o s p h e r i c space p r e s s u r e equals space P subscript a P r e s s u r e space i n s i d e space b u u b l e s space equals space P subscript 1 space a n d space P subscript 2 t h e r e f o r e space d i f f e r e n c e space i n space p r e s s u r e space o f space b u b b l e space w. r. t space P subscript a space P r e s s u r e space i n space a space s o a p space b u b b l e space i s space g i v e n space a s space fraction numerator 4 S over denominator r end fraction P subscript 1 minus P subscript a space equals space 4 space S space divided by space r 1 P subscript 2 minus P subscript a space equals space 4 space S space divided by space r 2 d i f f e r e n c e space i n space p r e s s u r e space a t space t h e space t o u c h i n g space s u r f a c e P 2 minus P 1 equals space 4 space S space divided by space r 2 space space space space minus space space 4 space S space divided by space r 1 fraction numerator 4 S over denominator r end fraction equals fraction numerator 4 S over denominator r subscript 2 end fraction minus fraction numerator 4 S over denominator r subscript 1 end fraction 1 over r equals 1 over r subscript 2 minus 1 over r subscript 1 equals 1 fourth minus 1 fifth r equals space 20 space c m end style
Answered by Expert 22nd December 2017, 3:02 PM
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