Question

olive oil of radius 1 mm spread into circular field of diameter 40 cm water such that the size of an olive oil​

Answer 1

Volume of the drop-

=

=

= 4.2E-9 m cube

Surface area of the film-

=

= 0.2E-2 m sq.

If we assume that the film is exactly one molecule thick, then,

diameter of an molecule= volume of the drop/surface area of the film

(Volume is constant)

diameter of an molecule= 4.2E-9/0.2E-2 = 21E-7 m = 2.1E-8 m = m

xEb =

Answer 2

hey !!

Here's your answer !!

we can use the circumference of circle here which is 2πr

where π = 22/7 and r = 40/2=20cm

put these values in above formula.

=2×22/7×20

= 125.70 [ required answer ]

hope it will help you !!

mark as brainliest !!

thank you :)

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