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Tram instead of trolley bus In Sheffield, and other cities, a system of trams has been installed. This has involved major work laying the tram lines. Why is this, overall, preferable to running trolley buses without needing rails ?
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Asked by stephenf
on 2010-08-04 22:13:19

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Categories: Transport.

Tags: trolleybuses, trams.

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Why do orbital space craft have to slow down via atmosphere braking? Could not one slow down in near vacuum and then simply return to earth at a much more sedate pace, thus negating the need for heat shielding?
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Asked by jimbarter
on 2010-07-23 15:14:47

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Categories: Transport.

Tags: Space, spaceshuttle.

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does the peleton in the tour de france behave like a liquid?
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Asked by mfdozier
on 2010-07-17 13:09:36

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Categories: Transport.

Tags: sport, cycling.

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Why do we freeze when we're in a vunerable position?

I live in central London (anyone who has driven through London will feel my pain here) and have several near-misses each month crossing the road on the way to school. I haven't been hit (fortunately) but have found that every time I have nearly been hit I freeze- even if I'm in the middle of the road.

I don't quite understand why I do that; I didn't stop consciously and it would surely make sense for me to keep walking until I was out of danger.

Could someone please explain this to me?

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Asked by Lana
on 2010-06-24 20:52:25

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Categories: Transport.

Tags: London, caraccident, hesitating.

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How many birds would it take to lift a human into the air?
(1 vote) average rating:2 There are 6 answer(s) for this question. View answers \| Submit an answer

Asked by MrTwinkey
on 2010-06-23 22:05:04

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Categories: Transport.

Tags: human, birds, lifting, carry.

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Global warming and human beings

Probably is a blind shot, but I would like to ask if somebody has calculated the impact in global warming of the direct heat. I am thinking for example in the human population (almost 7 billion with a constant average temperature of 36.5 º C). And not only that, but the average temperature of all the cattle in the world kept by humans, (billions of animals that otherwise wouldn´t exist). Also we could think in the heat from fires (both wildfires and the small ones) and the heat that escapes from our homes, vehicules or industries.

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Asked by entalto77
on 2010-06-21 09:05:02

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Categories: Human Body, Planet Earth, Weather , Animals, Environment, Transport.

Tags: animals, transport, weather, humanbody, environment, planetearth.

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Same but different? I have been thinking and would like to know . Are there really any advantages in running cars on electric power? Isn't it just changing one fossil fuel to another. Could someone please tell me what the advantages of electric powered cars are.
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Asked by stella1
on 2010-06-16 06:42:47

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Categories: Transport.

Tags: cars.

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could you somehow use the earth's magnetic fields to make levitating cars
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Asked by stella1
on 2010-06-15 09:58:40

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Categories: Transport.

Tags: hovering.

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Why is it easier to walk up the steps on a moving escalator than it is on a stationary one?
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Asked by prueheath
on 2010-06-07 12:26:41

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Last edited on: 2010-06-10 10:51:43

Categories: Transport.

Tags: transport, humanbody.

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If the combined exhausts of every car on the planet, were funneled through the channel tunnel, how much wind would it make? A secondary Q; what electricity would it create when powering a wind turbine?
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Asked by Lostrack
on 2010-05-20 00:15:55