CBSE Class 11-science Answered
Why does a needle floats on water but sink when some impurities are added.
Asked by Arun Iyer | 19 Feb, 2011, 05:29: PM
Expert Answer
Dear student
The surface tension of clean water being higher than that of water mixed with impurities, it can support the weight of a needle due to its surface tension. By addition of impurity, the surface tension of water reduces, thereby resulting in the sinking of the needle.
Hope this clarifies your doubt.
Regards
Team
Topperlearning
Answered by | 20 Feb, 2011, 11:47: AM
Concept Videos
-
Mechanical Properties of Fluids
This video explains streamline flow and the ideal motion of an ideal fluid. -
Mechanical Properties of Fluids
This video explains Bernoulli's principle. -
Mechanical Properties of Fluids
This video explains the concept of pressure and the influence of depth on p... -
Mechanical Properties of Fluids
This video explains Torricelli's law, speed of efflux, Venturi meter, possi... -
Mechanical Properties of Fluids
This video explains viscosity and coefficient of viscosity.
CBSE 11-science - Physics
Asked by rajuinwati12 | 04 Mar, 2024, 09:22: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by joelisaacsam | 09 Jan, 2024, 06:31: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by rupimadhes | 21 Nov, 2023, 05:31: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by arjunsah797 | 12 Mar, 2022, 11:10: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by suragimathpraveen2001 | 10 Jan, 2022, 08:06: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by raghuvanshisaumya461 | 03 Dec, 2021, 08:05: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by abhinavakrishna1009 | 31 Mar, 2021, 11:15: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by vanshraaj.ind | 13 Dec, 2020, 06:06: PM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by ashanihalchandani | 26 May, 2020, 09:11: AM
ANSWERED BY EXPERTCBSE 11-science - Physics
Asked by mahimanaik290 | 10 May, 2020, 12:45: AM
ANSWERED BY EXPERT
