1.

When an air bubble of radius r rises fromthe bottom to the surface of a lake, itsradius becomes . Taking theatmospheric pressure to be equal to 10 mheight of water column, the depth of thelake would approximately be (ignore thesurface tension and the effect oftemperature) :(1) 11.2 m(2) 8.7 m(3) 9.5 m(4) 10.5 m

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hi hello which class this

solov radius is 1 11.2m2



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