Why did some object sink while some objects floated ? Why did some object float in the middle of the column ?
so..... don't watch at Kevin chi, watch the liquid column, there is some pens or... are in the top of liquid, and watch there is an eraser under the liquid.
Now I'm going to answer the questions, that's talk about tension, every liquid have each tension, so some of things will floated and some of things will sink , I have an example, needle can float on water, it's tension. So that's why pen can floated on the liquid.
so..... don't watch at Kevin chi, watch the liquid column, there is some pens or... are in the top of liquid, and watch there is an eraser under the liquid.Now I'm going to answer the questions, that's talk about tension, every liquid have each tension, so some of things will floated and some of things will sink , I have an example, needle can float on water, it's tension. So that's why pen can floated on the liquid.
