Question

28. A soap film of surface tension 3x10--N/m
formed in rectangular frame can support a
straw. The length of the film is 10 cm. Mass of
the straw the film can support is
a) 0.06 gm
c) 6 gm
b) 0.6 gm
d) 60 gm​

Answer 1

Answer:

i think the answer might be 600 gm

Explanation:

given; $\frac{F}{2L}$(2l since there are 2 sides for the straw)=3×10

F=2x10x$10^{-2$x3x10=6N

but mg =f

which implies m =$\frac{6}{10}$ =.6 kg=600 gm