Sunday, July 05, 2009

Convection: In Liquid


The video shows how convection is like in liquid.

http://euiveoivoaviik.43.gs/mod_tech/node76.html















As water is being heated, the hot water rises while the cool water falls. This is because the cool water are denser than the hot water.
*The heat element is at the bottom.
















This shows the convection current in the liquid when the liquid is being heated.
The hot liquid is represented by the red arrows, which is going upwards.. The liquid that is colder is represented by purple arrows, which is going downwards.

Another Example of Convection: Lava Lamp


The lava lamp heats the wax, which will cause the wax expand and become less dense. As it is less dense, it rise upwards. As the wax cools and becomes denser, it will drop to the bottom again and gets heated again, and the whole cycle repeats.

Another Way of Convection: Ice Cube Convection


The green star-shaped ice cube was put into the warm water. The ice slowly melts and the water sinks down as it is colder and denser than the warm water. The warm water then rise up.

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