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6th Aug 2006

Q&A and What Does Derek Look Like?


Derek Thorne

Dave Ansell

Chris Smith

In our last show before the summer, Dr Chris, Dave and Derek answer all your questions on science, technology and medicine including: why paintings fade in sunlight, why hairs on different parts of the body grow at different rates, whether ultraviolet light poses a danger at the disco, how weightlessness can be experienced on Earth, and sticking with space, Steve Miller from University College London explains the origin of Jupiter's giant red spot and its smaller relative, red spot junior. We'll also be repeating a famous experiment to see if people can accurately estimate physical attributes from the sound of someone's voice, and in Kitchen Science, Derek and Dave dice with death as they calculate the drag on a flag at 70 miles per hour...

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News

 

Electrical Discovery Galvanises Wound Healing

Researchers at Aberdeen University have proved that Benjamin Franklin was right all those years ago to zap injured people with electricity, because a squirt of current can make wounds heal more rapidly. Writing in this week's edition of Nature, Min Zhao and his colleagues ...

 

PCs Saving the World

f you have a computer at home or at work which is on for long periods of time then you could be helping to find new drugs for HIV/AIDS, contributing to a model of how malaria spreads across Africa, or even working out solutions to a game of chess. And the best part is - yo...

 

Wanted People with Time on their Hands

The brains of bored volunteers could be the key to unlocking the secrets of distant star systems. Scientists working on the Stardust Mission, which returned from the tail of comet Wild 2 in January, are currently analysing dust particles that could reveal the chemical com...

 

Spices Curry Favour in Fight against Alzheimers

Alzheimer's disease is certainly a hot topic this month because researchers from Singapore have found evidence for a protective effect of eating curry. Tze-Pin Ng and colleagues, from the National University of Singapore, looked at the eating habits of over 1000 Asians age...



Kitchen Science

 

What the England football team cost a nation

How much are all those england flags costing the nation? We find out with a car, a force meter and a stick.


Questions

 

If you have a star which is approximately 860 000 miles across and it explodes like a supernova, would the matter coming from it travel faster than the speed of light. Would a gamma ray burst also travel faster than the speed of light?


 

Why do hairs grow at different rates?


 

Why do pictures fade in paintings and books? Is it a chemical reaction?


 

Does eating chillies help with neuralgia?


 

I was wondering what the difference was between hydration and water retention. I know that we need to be hydrated and don't want to have water retention, but what is actually happening in the tissues?


 

If it's ultraviolet light that causes skin cancer and there are UV lights in discos, are they dangerous? If not, why?


 

I want to know why a drink can doesn't get shaken up when it falls from a drink dispenser. It falls very hard but doesn't overflow when you open it straight away. Why do you think this happens?


 

In my car, if you keep the air conditioning on rather than having the windows open, it makes quite a difference to the fuel consumption. It seems to be better with the air con than having the windows open. I spend a lot of time doing 70 miles per hour on the motorway.


 

I was always fascinated with the state of weightlessness and how it works. A month ago I saw a report on artificial simulations of the phenomenon on CNN where people were on a plane and became weightless. How is it possible to nullify gravity in this way? Is it a question of zero acceleration or something like that? Is this how it works?





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