3D Modelling a ball mill

In order to manufacture powders that are extremely fine, a ball mill is usualy used due to its low maintenance and ability to work for long periods of time without attention. It is reliable and relatively cheap to make. A ball mill works by rotating a drum, or canister, filled with the coarse powde…

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Making a Ruben's tube that runs from deodorant for free

A Ruben's tube is a closed tube with many holes drilled into it. It has a diaphragm at the end of the tube, so that sound waves from an external source can easily enter the tube.  It can be used to demonstrate the effects of soundwaves visually, such as standing waves or pressure differences in …

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