Brain busters

[telectrix]

it's because the butty vans open at 7. everyone wants to be first in the queue.

 

[Richard Burns]

I would match with hightower, as dawn approaches the earth is facing into the dust cloud as earth orbits, during the night the earth is facing away from the dust so only particles moving faster than earth's orbital speed will enter the atmosphere; as dawn approaches the earths orbital speed adds to the meteoric dust speed to allow more particles to hit the atmosphere.

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[Midwest]

Need more info, I normally follow accoustic guitars as Im learning one but can't recall unless you narrow it down for us.

Perhaps it weren't yourself then. It was a bit like Funtwo, think he was French.

 

[Des 56]

I wonder if the earths magnetic field causes this effect,many meteors are often made of iron material

 

[telectrix]

I would match with hightower, as dawn approaches the earth is facing into the dust cloud as earth orbits, during the night the earth is facing away from the dust so only particles moving faster than earth's orbital speed will enter the atmosphere; as dawn approaches the earths orbital speed adds to the meteoric dust speed to allow more particles to hit the atmosphere.

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problem with your theory is that you are assuming that the earth is round and it orbits the sun. it has been for donkeys years, according to the catholic church, that the earth is flat, and the sun and planets orbit around earth. galileo was a heretic, should have been burnt at the stake, now that's out of the way, it's obvious that because the earth is flat, as morning comes, them pesky comets are skimming the surface, and so appear to be more in number because of collisssions and scatter due to flatness.

 

[Darkwood]

Question 2 Answer -

I think a few are hovering around the answer, its quite straight forward in that as the earth orbits the sun it can catch up to space debris but as the earth is revolving anyone entering night is going to be at the rear of its orbital path around the sun so many meteorites are blocked by the earths mass but from midnight onwards your position is exposed as you start to enter the lead side of its Sun orbit where it can catch up to meteorites and is not just exposed to random ones from any direction found as you head into night.

 

[Rpa07]

@hightower and his gnats theory?

Thanks for keeping us thinking Darkwood - it gets a little quiet in the dining room after the visitors have left and before Pete starts on the red!

 

[Darkwood]

Question 3 - Magnet and steel.

I have 2 identical pieces of what look like small steel blocks, approx the same size and shape as a fishfinger to give you an idea of scale.
One of these pieces is a permanent magnet and the other is an ordinary piece of steel, they of course stick together but can you say which one is the permanent magnet and which is the normal piece of steel, Oh!... you cannot use anything else in deciding just the two pieces of steel, so no trying to pick up paper clips etc, you cannot use anything else at all... So how can you tell which is which?

 

[Wilko]

Darn, I've thrown out my fish finger magnets so I can't try this ... but I'm thinking the N (or S) of permanent magnet will be attracted to the steel equally along the steel.

 

[Richard Burns]

Stroke the short end one of the pieces from end to end in one direction along the length of the other piece several times.
If the magnet is the short end piece then it will induce magnetism in the steel and then one end of the steel will be repellent to one end of the magnet, if the magnet is the length piece then the steel will not be magnetised and will not repel.

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[Darkwood]

@Richard Burns - No, although it may work there is a simpler way without turning the non-magnetised steel into a magnet.

PS hope members are not searching the net for this as quite a few pics are been posted off the net... its a thread to exercise the mind not the search engine , not aimed at anyone here, just a reminder to all to try resist the urge to look it up.

 

[Des 56]

Can it be something to do with making it into a compass,balance one on top of the other the magnetic piece only will move

 

[Darkwood]

The only nudge I can give anyone is to think about the properties of the bar magnet IE... it has a N end and a S end, is there any way we could exploit that fact to prove the piece of normal steel from the bar magnet?

 

[Richard Burns]

Spin them and see which one stops consistently nearer north south alignment, but that is using the earth's magnetic field, which we are not allowed to do.

 

[Rpa07]

What's a fish finger?

@Richard Burns - you sir, are the King of diagramitical explanation. You should have Beckhams knighthood!