Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Give answer! A certain number of spherical drops of a liquid of radius 'r' coalesce to form a single drop of radius 'R' and volume 'V'. If 'T' is the surface tension of the liquid, then:

A certain number of spherical drops of a liquid of radius 'r' coalesce to form a single drop of radius 'R' and volume 'V'. If 'T' is the surface tension of the liquid, then:

 

  • Option 1)

    energy =4VT \left( \frac{1}{r}- \frac{1}{R} \right )is\:\:released

  • Option 2)

    energy =3VT \left( \frac{1}{r}+ \frac{1}{R} \right )is\:\:absorbed

  • Option 3)

    energy =3VT \left( \frac{1}{r}- \frac{1}{R} \right )is\:\:released

  • Option 4)

    Energy is neither released nor absorbed.

 

Answers (1)

best_answer

As discussed

Surface Energy -

It is defined as the amount of work done in increasing the area of the liquid against surface tension.

-

 

 As surface area decreases so energy is released energy released = 4 \pi R^{2}T \left [ n^{\frac{1}{3}}-1 \right ]

R= n^{\frac{1}{3}}r

= 4 \pi R^{2}T\left [ \frac{1}{r} - \frac{1}{R}\right ] = 3 v \left [ \frac{1}{r}-\frac{1}{R} \right ]


Option 1)

energy =4VT \left( \frac{1}{r}- \frac{1}{R} \right )is\:\:released

This solution is incorrect

Option 2)

energy =3VT \left( \frac{1}{r}+ \frac{1}{R} \right )is\:\:absorbed

This solution is incorrect

Option 3)

energy =3VT \left( \frac{1}{r}- \frac{1}{R} \right )is\:\:released

This solution is correct

Option 4)

Energy is neither released nor absorbed.

This solution is incorrect

Posted by

perimeter

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET UG 2024: MCC withdraws two seats from MBBS, BDS, BSc Nursing special stray vacancy round
anam-khan

Maharashtra NEET PG 2024 seat matrix out; choice filling begins today, apply by November 25
anam-khan

MCC NEET UG 2024 special stray vacancy provisional allotment result out; report discrepancy by tomorrow noon

Latest Question