Pin Dish
Steel pin on a filter paper and put it on the surface of water in a china dish filter paper will soon sink?
the surface tension of the water will keep the needle afloat even though it is denser than the water. the water molecules stick together well and keep it afloat. they don't stick to the needle.
the water sticks to the coffee filter and makes it denser than plain water, so the filter sinks
if that's your question
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