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Grade: 11

                        

A Soap Film of surface tension 0.03N\m formed in rectangular frame , can support a straw . The length of the film is 10cm. mass of the straw the film can support is ???

9 years ago

Answers : (1)

Vikas TU
12141 Points
							
The weight of straw will be balanced by the force of surface tension.
Let the mass of straw is m, then
mg = 2Tl 
m = 2Tl/g  
m = 0.6g 
2 months ago
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