the resistance of a material

Original taken from re22ka in the resistance of a material

Only the master can give the guarantee and not 100%.


Manual glass cutting fraught – charted track glass cutter, held a couple of times – but no – a chip off the slicer and went to the side.
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NASA will arrange a controlled fire in space aboard Cygnus

How strange it may sound, but NASA really going to start a fire in space. This move is on a space ship Cygnus. Naturally, scientists and engineers plan something like this not for fun and not for show (although the show gets anyway). Arson is necessary in order to study the dynamics of fire in the space ship in outer space.
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Laser engraver on the basis of details of CD-ROM drives and an Arduino mega

A YouTube user with the nickname NeumiElektronik used old CD-ROM drives (servos and some other details), a laser diode with 150 mW and 405 nm and an Arduino mega to create a laser engraver. The Central platform moving under control of Arduino and the laser burns on the surface the details of the scheme and the patterns set by the wizard. The most interesting use case of such mechanism is the creation of printed circuit boards with photoresist.
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Written off the balance sheet. The unfinished Crimean nuclear power plant will go on for the construction of the Kerch bridge