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you can have so much fun with things inside your kitchen and make this centrifuge. colored
water, some oil, bowl and some steel balls. first take this bowl and at 3 points attach
the thread with the tape so that you can lift the bowl in air. what is unique? 3 points.
and if you attach the string at two points you will not be able to balance the bowl.
twist the bowl in one direction as much as you can. and now when you drop some steel
bowls inside this bowl and lift it the bowl will start spinning in the other direction
so fast that you can see the steel bowls going to the end and some them actually fly out
like canon balls. see the balls are aligned in a perfect circle because of the centrifugal
force which depends on how fast the bowl is rotating, pushing the steel balls to the end
and they stay there because of the friction with the bowl. this is the basic concept of
the centrifuge. now pour some color water inside and add some edible oil. these two
are of different densities. oil is lighter and so you can see it floating on water. again
twist the bowl and when you leave it you can see this wonderful centrifuge. water flies
out because it is more dense, edible oil is at center and some part of it which is more
orange is the overlap of water and oil. and there is nothing in the center which is just
the bottom of the bowl which is white. so you see four colors in this centrifuge. in
fact if you twist it more you might spill the water out. this is kitchen science and
you can play with this centrifuge.