AIPMT | 2014Momentum and CollisionHard
Question
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
Options
A.Energy = 4VT 
is released
is releasedB.Energy = 3VT 
is absorbed
is absorbedC.Energy = 3VT 
is released
is releasedD.Energy is neither released nor absorbed
Solution
Energy released = (Af - Ai)T
Af = 4πR2 =
Ai = n × 4πr2 =
⇒ Energy released = 3VT
Af = 4πR2 =
Ai = n × 4πr2 =
⇒ Energy released = 3VT
Create a free account to view solution
View Solution FreeMore Momentum and Collision Questions
The spring balance A reads 2 kg with a block m suspended from it. A balance reads 5 kg when the beaker with liquid is pu...Two charges moving under their only own mutual attraction separated by large distance initially. Then choose the correct...Two particles A and B of masses 2 m and m respectively are moving with same velocity v as shown in figure. At instant sh...An aeroplane of mass 3 × 104 kg and total wing area of 120 m2 is in a level flight at some height. The difference i...A large cylindrical tank of cross-sectional area 1m2 is filled with water. It has a small hole at a height of 1 m from t...