Turn the current to the electromagnet off.Switch the current on the electromagnet and place the ball-bearing directly underneath so it is attracted to it.Place the cushion directly underneath the end of the glass tube to catch the ball-bearing when it falls through.gpg -import KEYS gpg -verify downloadedfile. ![]() Measure this distance between the two light gates as the height, h with a metre ruler First download the KEYS as well as the asc signature file for the relevant distribution.Attach both light gates around the glass tube at a starting distance of around 10 cm.Make sure it faces directly downwards and not at an angle Place the glass tube directly underneath the electromagnet, leaving space for the ball-bearing.Do not switch on the current till everything is set up ![]()
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