NEET Physics Mechanical Properties of Fluids Questions Solved


If work W is done in blowing a bubble of radius R from a soap solution, then the work done in blowing a bubble of radius 2R from the same solution is 

(a) W/2                    (b) 2W

(c) 4W                     (d) 213W

 

(c) W=8πR2T    W R2       ( T is constant)

If radius becomes double then work done will become four times.

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