SUBMIT: Clever Idea for Magical Magnetic Fluid by August 1st. WIN: Your Very Own Bottle [Closed/Winner Announced]
Giveaway Tuesdays has officially ended! But don't sweat it, WonderHowTo has another World that's taken its place. Every Tuesday, Phone Snap! invites you to show off your cell phone photography skills.
Submit your best shot to our weekly competition for a chance to win an awesome prize. Phoneographers only—both Android and iPhone welcome! Check it out now.
UPDATE: There were a lot of great ideas submitted, but the two winners with the best ideas for using ferrofluid are Alexander Welk for his lava lamp concept and Kerec Tunca for the home decorating idea of ferrofluid sculptures adorning the walls (held by magnets). Congratulations!
For this week's Giveaway Tuesday, we're skipping the challenge and just giving the prize away! Well, you still have to do something to win, and that's racking your brain to come up with the cleverest use for the winning trophy—a bottle of homogeneous magnetic fluid (aka ferrofluid).
And just like last week, we will be choosing two winners.
It's called ferrofluid, but most know it simply as magnetic fluid—a thick, black-brown liquid that instantly responds to a magnetic field. Two winners will receive a one-ounce bottle of this colloidal magnetic fluid from Inventables. Unlike most magnetic fluids, this is not just iron filings, but a liquid made of magnetite that's actually homogeneous, meaning it's smoooooooth.
To make this ferrofluid, magnetite is ground into small particles and suspended in oil. The particles in the liquid must be just the right size (roughly ten nanometers). If the particles are too large they clump together like a fine magnetic powder. The particles must be small enough so they're not very different from the molecules of the fluid, but not so small that they lose their ability to become fully magnetic when placed in a magnetic field.
You can use this magnetic fluid for things like... well... that's what you have to tell us!
- Follow WonderHowTo on Twitter -OR- Like us on Facebook.
- Post ONE ingenious idea below in the comments.
- TWO winners with the best use will be selected.
All entries must be in by Monday, August 1st, 11:59pm PST. Standard rules apply. Post any questions below.