Things you always wanted to know the answer to.
Discussion
Steamer said:
Jonny671 said:
Using the plate from this one;
The colour section says; "Colour Not Stated".
Just to throw another spanner in the works
Not exactly something 'I've always wanted to know the answer to' but can anyone tell me how many of these there were and how many are still on the road?!The colour section says; "Colour Not Stated".
Just to throw another spanner in the works
I haven't seen one in ages. But there used to be a couple in our town, back in the day.
Lefty 200 Drams said:
If you perform CPR and succeed, does the person always regain consciousness straight away, cough a few times and 5 minutes later be right as rain again?
As is always shown in TV/films. I doubt it. Is it not more likely they might start breathing but still be unconscious for a (varying) period of time?
irrc you cannot re-start a fibrillating heart unless using a defibrillator (except sometimes in children). Youre only keeping the heart pumping manually till a paramedic arrives with one. Recalled from first aid training day. As is always shown in TV/films. I doubt it. Is it not more likely they might start breathing but still be unconscious for a (varying) period of time?
Mr.Jimbo said:
Sooooo they'll probably be on the logbook as their original colour, pre-panel swap 
The panel swap was done in the factory I believe, so would be long before they were registered. I guess it's hard to register them as any one colour, as they're clearly not one colour, regardless of what colour the chassis may be.Daniel1 said:
Lefty 200 Drams said:
If you perform CPR and succeed, does the person always regain consciousness straight away, cough a few times and 5 minutes later be right as rain again?
As is always shown in TV/films. I doubt it. Is it not more likely they might start breathing but still be unconscious for a (varying) period of time?
irrc you cannot re-start a fibrillating heart unless using a defibrillator (except sometimes in children). Youre only keeping the heart pumping manually till a paramedic arrives with one. Recalled from first aid training day. As is always shown in TV/films. I doubt it. Is it not more likely they might start breathing but still be unconscious for a (varying) period of time?
Hmm.
Jonny671 said:
Not, 'what I've always wanted to know', but..
How do you describe that feeling in your mouth when your brushing your teeth?
Its not spicy, as well toothpaste isn't spicy, but it does burn your tounge now and then.
Hmm..
Why do people find it so difficult to spell the word "tongue"?How do you describe that feeling in your mouth when your brushing your teeth?
Its not spicy, as well toothpaste isn't spicy, but it does burn your tounge now and then.
Hmm..
Imagine if you will, a perfectly round and rigid disc, something like a CD, but an absolutely perfect circle round the circumference.
Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Big Rod said:
Imagine if you will, a perfectly round and rigid disc, something like a CD, but an absolutely perfect circle round the circumference.
Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Depends how thick it is.Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
HereBeMonsters said:
Jonny671 said:
Not, 'what I've always wanted to know', but..
How do you describe that feeling in your mouth when your brushing your teeth?
Its not spicy, as well toothpaste isn't spicy, but it does burn your tounge now and then.
Hmm..
Why do people find it so difficult to spell the word "tongue"?How do you describe that feeling in your mouth when your brushing your teeth?
Its not spicy, as well toothpaste isn't spicy, but it does burn your tounge now and then.
Hmm..
Famous Graham said:
Big Rod said:
Imagine if you will, a perfectly round and rigid disc, something like a CD, but an absolutely perfect circle round the circumference.
Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Depends how thick it is.Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Famous Graham said:
Big Rod said:
Imagine if you will, a perfectly round and rigid disc, something like a CD, but an absolutely perfect circle round the circumference.
Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Depends how thick it is.Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Famous Graham said:
Big Rod said:
Imagine if you will, a perfectly round and rigid disc, something like a CD, but an absolutely perfect circle round the circumference.
Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Depends how thick it is.Then imagine resting it perfectly upright on a perfectly flat and rigid surface. Like putting the edge of the CD on a table top at a right angle but as I say the objects are completely round and completely flat respectively.
How much contact area is there?
I appreciate that they'll touch at a point, but how big is that point?
Or, is the contact area so small as to be tending to 0 and the two aren't actually touching at all?
Let's not consider that plane.
Given that any other point on the edge of the disk even a millionth of a minute off the point of contact is no longer at a right angle to the surface, then there's no way it can be touching.
My question is how wide is the point of contact?
Does that make more sense?
Big Rod said:
youngsyr said:
... and on the dimensions of the circle - the larger the circumference, the more contact area.
Not really, see my previous response.It may be tiny but the circumference does make a difference.
What if it was two circles? Would the contact area be zero?
The contact is there so there must be contact area.
Howard- said:
What do the numbers on those little yellow signs you see every so often along motorways and major A roads mean?
What signs do you mean, can you find a pic? If it's the ones with the yellow writing you mean, then it's as follows:A38 - name of road
A - direction of travel (signs on the other side of the road will say B
415.0 - distance in km from the start of the motorway
A perfect disc touching a perfect plane will touch at a point, which has no dimensions. This assumes an infinite Young's modulus for both parts (i.e. neither part can deform).
If the disk has some thickness, the contact now becomes a line, which has length but no width, and therefore no area.
This is all irrespective of the dimensions of either part.
In the real world, it is a function of the geometry and the Young's moduli (elasticity, if you like) of the two parts, and how hard they are being pushed together.
Cheers,
FT.
If the disk has some thickness, the contact now becomes a line, which has length but no width, and therefore no area.
This is all irrespective of the dimensions of either part.
In the real world, it is a function of the geometry and the Young's moduli (elasticity, if you like) of the two parts, and how hard they are being pushed together.
Cheers,
FT.
Fume troll said:
A perfect disc touching a perfect plane will touch at a point, which has no dimensions. This assumes an infinite Young's modulus for both parts (i.e. neither part can deform).
If the disk has some thickness, the contact now becomes a line, which has length but no width, and therefore no area.
This is all irrespective of the dimensions of either part.
In the real world, it is a function of the geometry and the Young's moduli (elasticity, if you like) of the two parts, and how hard they are being pushed together.
Cheers,
FT.
Thank you!! If the disk has some thickness, the contact now becomes a line, which has length but no width, and therefore no area.
This is all irrespective of the dimensions of either part.
In the real world, it is a function of the geometry and the Young's moduli (elasticity, if you like) of the two parts, and how hard they are being pushed together.
Cheers,
FT.
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