Naked Scientists Podcast

Naked Scientists episode

Sun, 9th Dec 2007

Naked Science Q&A Show

Bread and Toast (c) Rainer Zenz @ wikipedia

This week, we take on your science questions, tackling the sticky subject of how glue works, the explosive potential of underground uranium and the problems with performance enhancing-football shirts.  We look into gastroenteritis and find out how just one gram of vomit could infect one million people, and if that hasn't put you off your food, how acrylamide, found in toast and other tasty foods, may cause cancer.  Plus, how the future of the paperback could be plastic, and in Kitchen Science we tell you the easy way to keep mirrors mist-free - using only soap!

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In this edition of Naked Scientists

Full Transcript

  • 24:57 - Gastroenteritis and Noroviruses

    In the East of England recently we’ve had a big outbreak of a problem caused by Norovirus, a virus that causes vomiting and diarrhoea. Jim was affectionately called ‘the poo man’ by one of his colleagues, and he came in to speak to us about what causes these outbreaks.

  • 30:02 - Paperless Paperbacks?

    The internet has revolutionised the way we purchase and use music, but just what is the future for books?

  • 36:26 - Why can small masses do damage in space?

    I saw an astronaut on the shuttle lifting a piece of very heavy equipment with one hand, but they said he had to put it down very slowly, as it could still do a lot of damage. I don’t understand how that could be!

  • 37:32 - Charged shirts and thunderstorms

    Thursday's Daily mail reported that Portsmouth FC’s shirts have negatively charged ions to increase performance. Is that risky in thunderstorms?

  • 39:46 - Acrylamide & Heart Surgery

    Each month we catch up with Mark Peplow, editor of the Royal Society of Chemisty's magazine, Chemistry World.

  • 44:17 - The Electrified Car Hop

    As a university student, I worked on a research project involving a state highway department. Part of our mandatory safety training involved discussion of high tension (23kV) power transmission lines. The safety trainer told us that if a power line fell across our car, it was not...

  • 50:08 - Are Plutonium and Uranium found in the ground?

    Are Plutonium and Uranium found in the ground, and if so could you accidentally trigger a nuclear explosion?

  • 51:12 - Can one tell from layers how long an oyster lived?

    Fossil oyster shells wash up on the beach of the James River, a part of the Chesapeake Bay, in Virginia. They are made of many layers shown of mother-of-pearl. Can one tell from these layers how long such an oyster lived? I've counted up to 52 layers from one of these.

  • Can diseases hit men and women differently?

    We've had a bit of an epidemic here around Boston these last two months, and I've been getting into some trouble with my feminist friends for saying this, but of all those I know who've gotten it, the women have been hit far worse than the guys. For instance, I had a very upset s...

 

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For the same reason that touching the microphone input of any amplifier I seemed to build as a kid resulting in London's Capital Radio (now Capital Gold 1548AM) sounding loud and clear! (I lived in North London)

It's an amplitude-modulated radio wave, which means the amplitude (strength) of the radio wave is adjusted to follow the audio-frequency input signal. Any guitar-lead or connection to the amplifier-input can act as an aerial, and then any diode-like component in the amplifier input rectifies the strong radio signal (and stray capacitance smooths over the bumps) leaving the original (radio) audio signal to be amplified by the amplifier. This ad-hoc radio is untuned, and will respond to any sufficiently strong AM radio signal. techmind, Mon, 10th Dec 2007

Not to sure about all that techmind.

The reason I say that is taxi radios don't operate on the AM band, they normally transmit on FM.

Any long leads going to or from an amp can pick up stray rf waves, not just on the input side. I have a digital amp that sometimes picks up passing taxi broadcasts from the speaker leads!

Bee



that mad man, Thu, 13th Dec 2007

Dec. 9th EH.. I see my Question in that list! YAYYYYYY! Karen W., Thu, 5th Nov 2009

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