Lycopodium powder is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged at the centre of the...

      

Lycopodium powder is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged at the centre of the water surface. State and explain the observation

  

Answers


sharon
The powder around the hot needle moves away.
Reason
- The high temperature of the needle lowers the surface tension of the water around it.
- High surface tension on the sided pits the powder away
sharon kalunda answered the question on April 3, 2019 at 13:59


Next: Water in a dam falls through a height 24.5m. If we assume that there are no energy losses,calculate the new temperature of the water as...
Previous: a) The data below was obtained in an experiment to estimate the diameter of an oil molecule:-

View More Physics Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions