Physics · 2022
JEE Main · 30 July 2022, Shift 2 · Q27
A water drop of radius 1 cm is broken into eight equal droplets. Surface tension of water is 0.075 N m^-1. The gain in surface energy is \ \ \ \ ×…
A water drop of radius $\displaystyle 1$ cm is broken into eight equal droplets. Surface tension of water is $\displaystyle 0.075 \mathrm{~N} \mathrm{~m}^{-1}$. The gain in surface energy is \_\_\_\_$\displaystyle \times 10^{-7} \mathrm{~J}$.
(Take $\displaystyle \pi=3.14$ )
Official answer
942
More from Surface Tension and Viscosity
- Eight mercury drops, each of radius r, coalesce to form a bigger drop. The surface energy released in this process is ____. (S is the surface tension…2026
- The diameter of an air bubble which was initially 2 mm, rises steadily through a solution of density 1750 kg m^-3 at the rate of 0.35 cms^-1. The…2022
- Pressure inside a soap bubble is greater than the pressure outside by an amount: (given: R= Radius of bubble, S= Surface tension of bubble)2024
- Two spherical soap bubbles of radii r_1 and r_2 in vacuum combine under isothermal conditions. The resulting bubble has a radius equal to:2021
- A small ball of mass M and density ρ is dropped in a viscous liquid of density ρ_o. After some time, the ball falls with a constant velocity. What is…2023
- The terminal velocity of a metallic ball of radius 6 mm in a viscous fluid is 20 cm/s. The terminal velocity of another ball of same material and…2026
- A small spherical droplet of density d is floating exactly half immersed in a liquid of density ρ and surface tension T. The radius of the droplet is…2020
- The velocity of upper layer of water in a river is 36 kmh^-1. Shearing stress between horizontal layers of water is 10^-3 Nm^-2. Depth of the river…2022
JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.