Surface energy ratio when a drop splits into or forms from equal droplets
This type of question, asked 12 times: May 2021 S1, 11 May 2023 S1, 16 May 2023 S2, 12 May 2024 S1, 12 May 2024 S2, 14 May 2024 S2, 20 Apr 2025 S1, 20 Apr 2025 S2, 11 Apr 2026 S2, 13 Apr 2026 S1, 13 Apr 2026 S2, 16 Apr 2026 S2. All 14 questions below, oldest first.
Try each one first, then open its answer.
Question 1
May 2021 S1
50One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to the total initial surface energy isTap an option to check your answer.
Question 2
11 May 2023 S1
6A big water drop is formed by the combination of 'n' small water droplets of equal radii. The ratio of the surface energy of 'n' droplets to the surface energy of the big drop isTap an option to check your answer.
Question 3
16 May 2023 S2
36A liquid drop having surface energy is spread into 512 droplets of same size. The final surface energy of the droplets isTap an option to check your answer.
Question 4
12 May 2024 S1
18A spherical drop of liquid splits into 1000 identical spherical drops. If is the surface energy of the original drop and is the total surface energy of the resulting drops, then . Then value of isTap an option to check your answer.
Question 5
12 May 2024 S2
41Eight small drops of mercury each of radius '' coalesce to form a large single drop. The ratio of total surface energy before and after the change isTap an option to check your answer.
Question 6
14 May 2024 S2
21000 small water drops of equal size combine to form a big drop. The ratio final surface energy to the total initial surface energy isTap an option to check your answer.
Question 7
20 Apr 2025 S1
26The surface energy of a liquid drop is ' '. It is sprayed into 1000 equal droplets. The surface energy of all the droplets isTap an option to check your answer.
Question 8
20 Apr 2025 S1
32A liquid drop having surface energy E is spread into 729 droplets of same size. The final surface energy of the droplets isTap an option to check your answer.
Question 9
20 Apr 2025 S2
46A liquid drop having surface energy is sprayed into 512 droplets of same size. The final surface energy isTap an option to check your answer.
Question 10
11 Apr 2026 S2
109A liquid drop having surface energy E is sprayed into droplets of the same size. Then the final surface energy isTap an option to check your answer.
Question 11
13 Apr 2026 S1
110Two small drops of liquid of same radius coalesce to form a big drop. The ratio of the total surface energies after and before the change isTap an option to check your answer.
Question 12
13 Apr 2026 S2
111A spherical drop of liquid splits into identical spherical drops. If is the surface energy of the original drop and is the total surface energy of the resulting drops, the (ignoring evaporation). . Then value of isTap an option to check your answer.
Question 13
13 Apr 2026 S2
110Determine the ratio of surface energy of large drop to small drop, if small drops combined to form large drop.Tap an option to check your answer.
Question 14
16 Apr 2026 S2
109One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to the total initial surface energy isTap an option to check your answer.