Monday, April 2, 2007

Excellent video demonstrating density and heat transfer of liquid!

Can view the video here if the embedded one has problem:


  • Oil is less dense than water, hence it floats as a separate layer on top.
  • Heat transfer in liquid is mainly via convection currents.
  • As the oil is heated on top of the water, very minimal heat is transferred to the water as there is no convection current generated in the water.
  • The goldfish tends to stay at the bottom of the tank. Guess why?
  • Question: Where does the goldfish obtain the oxygen?

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