quick sand demo
by steve archer
I took a plastic cake pan dish and drilled a hole in bottom then I took a litre coke bottle drilled hole in cap then took clear 1/2 inch plastic tubing and inserted in cap and bottom of cake pan.
I filled the pan with white silica sand then filled bottle with water then put a steel ball bearing on top of sand.
I turned the water bottle upside down and the water rushed in the bottom and the ball bearing sinks!
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