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4th February 2005 Issue: 18

Get your frying pans at the ready as it’s time for the Wired-Up pancake special. But first, take a look at the menu:

  1. THE WIRE – How to cut out the batter splatter with a little science know-how!
  2. SPOTLIGHT ON – A material that’s out of this world...
  3. TRY THIS! – This experiment could leave a bitter taste in your mouth!
  4. GEAR FOR GRABS – Win a bumper science kit worth £100!
  5. WIRED BYTES – Calling all subscribers for our homework helper special!
1. THE WIRE – Science news delivered to your inbox...

Most Pancake Days go with a flop instead of a flip, but fear not...

May your pancake mixture never hang from the ceiling again, thanks to an ingenious formula from scientists at Leeds University. They’ve tossed aside the traditional method of pancake flipping (which usually involves keeping your fingers crossed in the hope the batter won’t end up on the floor!) and they’ve replaced it with this mathematical formula:

“The angular velocity of the pancake equals the square root of Pi, times the gravity divided by the distance the pancake is from the elbow times four.”

As long as you understand the formula your pancake will land back in the frying pan every time you flip it. Try it yourself and you may find pancake physics flipping marvellous!

(On the other hand, if the equation has left you stumped then a simple spatula will do the job just nicely instead!)

2. SPOTLIGHT ON – polytetrafluoroethene...

Of course, it’s not only the flipping you have to get just right. You really need the right equipment to do the job too, and that’s where ‘non-stick’ technology comes into play.

In 1938, scientists at a company called DuPont, accidentally discovered a polymer compound. Its name is polytetrafluoroethene, or PTFE, but the name you’ll know it by is its trade name, which is Teflon. It certainly helps Pancake Day go with a flip as it stops pancakes (and other food) sticking to the bottom of the frying pan. But what makes Teflon so special?

Teflon is a very versatile material. It is unreactive, heat resistant, and has a melting point of 327 ºC. It is flexible, but tough, it doesn’t absorb moisture and it doesn’t rust. But the thing that makes Teflon so special is that it has the lowest coefficient of friction of any solid material known to man. In simple terms, this means things won’t stick to it, which is why it is used as a non-stick coating for frying pans.

Would you believe that in 1969, Teflon featured in the space suits, blankets, heat shields and insulation of the lunar module in which Neil Armstrong and his colleagues landed on the moon? The Teflon formed a protective layer to prevent the space suits from getting scraped. Back on earth, these days you can even wear Teflon fabric protector to protect your clothes from dirt and spills!

So that’s your equipment and technique sorted for Pancake Day. All you need now is the topping. Most people’s favourite topping is lemon juice and sugar, so you should have plenty of ingredients in the cupboard for the following experiment...
3. TRY THIS! – Turn your kitchen into a lab and cook up some real science treats...

Stuff You Need:

  • Lemon Juice
  • Kitchen scales
  • Cotton wool balls

What To Do:

  1. Squirt a drop of lemon juice onto your tongue and swish it around your mouth for 10 seconds.
  2. Get a cotton wool ball and soak up all the saliva (spit) in your mouth. Use as many cotton wool balls as you need.
  3. Put the used cotton wool balls on the scales and see how much they weigh. Make a note of this measurement.

Scientists claim that the amount of saliva you produce after putting a drop of lemon juice on your tongue might have something to do with what type of person you are...

People who are said to be ‘extroverts’ are confident and outgoing. Scientists say they won’t produce much saliva after placing the lemon juice on their tongues.

People who are said to be introverts are shy and quiet. Scientists say they will produce a lot of saliva after placing lemon juice on their tongues.

It’s all to do with a part of your brain called the Reticular Activating System. We’ll leave the full explanation until after the results are compiled so first, read on for further details...

4. GEAR FOR GRABS – You’ve got to be in it to win it...

Wired Up wants to know how you get on in the lemon juice experiment, and in return Planet Science is offering you the chance to win a science kit worth £100! The kit contains an electronics set for your computer, a telescope with astronomy book and a number of other science books to help with your studies.

To be in with a chance of winning, send the total weight of your cotton balls (in grams) to: wired-up.news@nesta.org.uk with ‘I’M A LITTLE SQUIRT” as the subject. To find out whether the lemon juice experiment results tally up, you also need to include in your email whether you think that you are an introvert or an extrovert i.e. are you generally a shy, quiet person or are you generally loud and outgoing?

Once the results are gathered they’ll be featured in a future Wired-Up. In the meantime, all the emails received will go into the draw to win the super science kit.

That shouldn’t leave a bitter taste in your mouth!
5. WIRED BYTES – It’s your corner of the Wired-Up e-zine...

Finally, this issue we’re launching a new section to the Wired-Up e-zine – your very own science homework helper service...

Are you confused about chemistry, perplexed by physics or bamboozled by biology? If the answer is YES, YES, YES, then all you have to do is jot your question in an email and send it to: wired-up.news@nesta.org.uk with ‘WIRED BYTES’ as the subject. We’ll try to answer as many questions as possible, so look out for your answer in a future issue of Wired-UP.

Ah! Yet another flipping great Wired-Up to add to the collection...

THAT’S ALL FOR NOW

Got Wired-Up? Got clued up!

Don’t forget that Wired-Up will be hitting your inboxes every fortnight from now on, but in the meantime, send any questions, comments, jokes or experiment ideas to: wired-up.news@nesta.org.uk

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