Normally our 5-Minute Initiatives contain soldering and LED lights and different such digital accoutrements, however this week we determined to skip the flamboyant stuff in favor of an old-school science challenge: making rheopectic slime from Borax and glue. This can be a fairly protected experiment even for youths–simply make sure that to do it with parental supervision and hold the Borax, slime, and any fingers which were touching the aforementioned objects out of eyes, noses and mouths.
The neat factor about rheopectic slime (in addition to the impossible-to-resist gag of fake-sneezing into your fingers after which exhibiting the flowing goo to your revolted victims) is its non-Newtonian fluid property. Most fluids get much less viscous the extra you manipulate them–consider how honey or oil change into “wetter” as they heat up and extra strong as they cool. These are Newtonian fluids. However non-Newtonian fluids do they reverse: they get extra strong the extra they’re manipulated. So for those who let this slime sit on a floor, it’s going to pool out right into a flowing mess, however for those who play with it, it turns into thicker and bouncier. You may even type it right into a ball.
Watch the video to see the way it’s executed: use extra Borax to make a stiffer, bouncier slime, and use much less to make Ghostbusters-style “ectoplasm.”