Q&A Show - Your Questions Stripped Down
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Mirrors, Magnets and Meteorites make an appearance in this week's Naked Scientists Question and Answer Show. We find out how the immune system could be convinced to fight skin cancer, how future MRI scans could be in colour, and why easy-clean computer keyboards could help keep MRSA out of hospitals. We answer your questions about inhaling helium, wind turbines, bacteria and the molecular basis of mirrors. Plus, in Kitchen Science Dave sets us the Balloon Kebab Challenge!
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Do you ever eat at your desk at work? It may worry you that your computer keyboard is a hotbed of bacteria, but even more worrying is the fact that keyboards in hospital wards also house bacteria. Dr Peter Wilson is from University College London Hospital, and he’s taken steps...
What’s happening at a molecular level when a mirror is reflecting light? I’ve looked up some articles but it doesn’t explain what exactly is happening.
[On a previous podcast] You said it would take a photon about a million years to pass from the centre of the sun outwards, but I thought the speed of light was constant?
Put a skewer straight through a balloon to form a kebab without having to hold your ears!
I have two young daughters aged 6 and 8. They’re losing their baby teeth. I’m wondering why the teeth falling out don’t have any roots. Surely teeth have roots. Where are they going?
Is there a gas that can do the opposite of helium to the voice?
How do bacteria know where they are in your body? Things like cholera infect your guts. How do they know to get there?
Why do wind turbines only have three blades?
Meera met our regular tech correspondent, Chris Vallance, to discover hyper-local news – the newest online development where you can find out the latest news about specific roads or postcodes, and build a modified map to show anything from the nearest schools to the nearest mass...
What would happen if you put a very strong magnet behind the mirror? Would this cause the light to go out of focus?
I was listening a couple of weeks ago about the brain controlled electronic lymph systems and I was wondering if they would be of any benefit to cerebral palsy sufferers?
Coloured objects, red ones, blue ones, whatever. For this purpose, one assumes that light is waveforms as opposed to particles of energy. Traditional theories state that a green object appears green because it reflects green light and absorbs other frequencies: red, likewise. Wh...
My father who’s now 90 has a very peculiar little object. He’s an ex-electrician and likes gadgets. He’s got this little object on his window facing the sun. It consists of a glass tower, almost the shape of the Eiffel Tower, in the centre of which is a glass bulb about 5cm diame...
As lightning can strike in the same place twice if you get struck by lightning and it stops your heart and then you get struck by it again would it restart you heart?
When I let my grandson’s helium balloon go up after his birthday we let it vanish into the sky. Could you tell me whether it would be affected by the very cold atmosphere if it reached 5 miles? Would it just pop or what would happen to it?
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