Will It Centrifuge? (part 3 - the Club Edition.)

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Introduction: Will It Centrifuge? (part 3 - the Club Edition.)

It had to happen.

My science clubbers got wind of the centrifuge's existence, and demanded to have a go with their own samples. Some of them made their own mixtures, just to see if they could be separated by sheer force of gravity.

The samples got spun up in batches of four:

Batch 1:
  • Hair gel mixed with pure blackcurrant juice (yellow tube)
  • Mud, water, pencil shavings and washing up liquid (blue tube)
  • Brown sauce (it's a British condiment) (orange tube)
  • Salad cream (light pink tube)

Batch 2:
  • Flour mixed with green food colouring, washing up liquid, water and rice mixed with blue food colouring. (green tube)
  • Strawberry jam (with bits) (dark pink tube)
  • Flour, water and green food colouring (orange tube)
  • Raspberry jam (no bits) (light pink tube)

Batch 3:
  • "American hot dog mustard" (yellow tube)
  • Melted Margarine (blue tube) (melted by floating tube in hot water for a couple of minutes)
  • Crunchy peanut butter (orange tube)
  • Rice, water and blue food colouring (green tube)

I've posted each sample as "before" and "after", to make the changes (where they occur) more obvious.

The shot of the inside of the centrifuge shows a thin beige line - the clubber who filled the peanut butter tube didn't clean the outside of the tube properly, and slowing from 13,000rpm to stationary in a few centimetres mashed the debris evenly around the centrifuge's innards. Fortunately it wiped off easily.

Watch out for the margarine...

Need some backgound?
Part One
Part Two - Blood!
Original Forum Thread

And a "How To" Instructable is in the pipeline, I'm just waiting for some information.

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51 Comments

Wow! This machine is cool! I really love the experiments you are doing! I was just wondering where can you get it? And how much will it cost in Canadian money? I wonder what happens if you put Non-Newtonian Fluid (Oobleck) in the microfuge? I want you to try it, you don't have to, but I wish you did. Thanks,

I got it for free, donated to the school through a government scheme, but you could try here.

As you showed in p1 you're trying to run a 13k rpm centrifuge with a 12w (12v 1A) power supply. I bet its doing < 2 krpm. Give it more AMPS.

It's the power supply recommended by the manufacturer.

ok , just a suggestion. No harm will come of trying a bigger psu at the same voltage. Good writeup.

ew i wouldn't try urine... but maybe is you try fatty yogurt or maybe some mayonaise

Urine, try urine!

You have to do a tiny martini in this. That's an order.