Magnetic stand made from old magnet, will take care about the safety of various small items — from paper clips and pins to “precisely” small tools and fasteners. It will also help to find them on the floor, covered with a fleecy rug.
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...it is possible to make a device for determining the marks in the construction of garden buildings. For this you will need a long hose with transparent bits filled with water.
“E-COLI”
Instead of bulky and uncomfortable electrostatic machines Wimshurst, coils Ruhmkorff in high school physics classrooms are increasingly high voltage converters voltage. They can be used...
