NewScientist The Last Word - Tag 'Earth' details

Tag 'Earth' details

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Why does the atmosphere stay round the earth? The power of a vacuum is very obvious. Suction pads can defeat the earths gravity and lift a person up off the ground. So why does the vacuum of space not suck the air molecules away from earth, when the vacuum force is far greater than the earths gravitational pull? Am i overlooking something?
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Asked by rob.stass
on 2009-09-22 16:55:52

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Categories: Our universe.

Tags: Space, Earth, gravity, atmosphere, Air, vaccum.

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Will space ever fill up? We are constantly releasing materials such as gases and sattelites into space, surely it would eventually fill up with them. Even if it won't, if we increased the amount of materials we released into space to an amount that was at a faster rate than the rate that the universe is expanding, would it fill up?
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Asked by handym
on 2009-09-05 13:17:32

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Categories: Our universe, Planet Earth.

Tags: Space, Earth, vacuum.

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What would happen to life on Earth if the moon was knocked out of Earth orbit by an asteroid?
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Asked by DRZ
on 2009-08-26 14:59:50

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Categories: Planet Earth.

Tags: Earth, moon, orbit, asteroid.

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Journey to the centre of the earth? If I was to take a huge heat-proof tube and stick it through the very centre of the earth and then jumped down it, what would happen when I reached the middle? Would I float at the very centre?
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Asked by reubinio91
on 2009-08-22 12:26:07

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Last edited on: 2009-08-22 12:30:45

Categories: Planet Earth.

Tags: Earth, gravity, jumping, tunnel, centreoftheearth.

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If space is cold how close would you have to get to the sun to feel its heat?

I understand that on earth we feel the heat of the Sun because it radiates light to earth which then gets trapped within our atmosphere and gives out heat. Space, being a vaccum, would contain no heat as there is no matter to conduct the heat of the Sun, so how close could you get to the sun before you would feel any heat from it? Also would the sun not be able to radiate heat in the form of light to human skin in the same way as it radiates heat to the earth?

Many Thanks

James Stretton (Colchester)

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Asked by jamesstretton
on 2009-08-18 12:56:12

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Categories: Our universe.

Tags: light, Earth, heat, sun, waves, atmosphere, matter, vaccum, warmth, radiate.

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If you removed all empty space from within the atoms that make up my body would the resulting mass be visable? Excluding any blackholes or other exotic phenomena, how small would the earth become if you removed all the empty space from its atoms (approx of course). I did email these questions to newscientist years ago, but never did get any feedback.
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Asked by nathanunderwood
on 2009-08-14 15:03:13

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Categories: Human Body.

Tags: Earth, atoms, mass, emptyspace.

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If Earth were a perfect sphere, it would be completely covered by an Ocean. How deep would that Ocean be?
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Asked by rhvanhuijsduijnen
on 2009-08-06 15:37:56

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Categories: Planet Earth.

Tags: Earth.

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Water world The Last Word has told us what percentage of the UK's surface area is roads (24 January 2004), but having just returned from the Netherlands I would like to know what percentage of the surface area of that country is water.Byron Hambleton, Lille, France(Image: NASA World Wind)
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Asked by Michael Marshall
on 2009-06-17 17:01:01

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Categories: Planet Earth.

Tags: animals, unanswered, domestic science, planet earth.

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Clear waters After an electrical storm, the water in my father's small fish pond is crystal clear, having previously been full of green algae. Similarly, my parents' drinking water comes straight from a nearby reservoir and often contains organic matter, but a storm also appears to clean it up. What could cause this?Michelle, Johannesburg, South Africa(Image: enrika79, stock.xchng)
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Asked by damian
on 2009-04-09 12:55:48

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Categories: Planet Earth, Plants, Unanswered.

Tags: unanswered, technology, plants, transport, planet earth.

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Hidey hole With climate change, earthquakes, volcanic eruptions and other natural disasters to contend with, where on the planet is the safest place to live?Michael Leonard, Stoke-on-Trent, Staffordshire, UK(Image: Pyroclastic flows at Mayon Volcano, Philippines, 1984, United States Geological Survey)
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