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Posted: **Sat Feb 15, 2014 2:01 pm**

Having pondered this for several seconds, my brain has returned a null pointer exception.
At the moment all my attention is fully taken with Eve Muirhead and Anna Sloan (and the other two)
Normal service may not be resumed for a while

Posted: **Sat Feb 15, 2014 7:11 pm**

You have finally figured it out. It is all theory.

Posted: **Sat Feb 15, 2014 11:10 pm**

tanneman wrote:You have finally figured it out. It is all theory.

Very ancient theory, by all accounts.

Staggering to think just how many thousands of years ago.

Posted: **Sun Feb 16, 2014 4:42 pm**

Corvus wrote:
tanneman wrote:You have finally figured it out. It is all theory.
Very ancient theory, by all accounts.

Staggering to think just how many thousands of years ago...

...this thread started

Posted: **Tue Feb 18, 2014 7:05 am**

Boxermed69 wrote:
Corvus wrote:
tanneman wrote:You have finally figured it out. It is all theory.
Very ancient theory, by all accounts.

Staggering to think just how many thousands of years ago...
...this thread started

I am deeply chagrined.

Posted: **Fri Feb 13, 2015 8:07 am**

Corvus wrote:
Corvus wrote:
tanneman wrote:Infinite, it is used only for calculations. You would not be able to see it with the naked eye, that is why the theory regarding physics, chemistry and maths works.
It's a very weird place!

Dimensionless, except for length (unless it is an infinitely thin disc! )

Going back to my question "is there any place on a spinning disc or shaft where the angular velocity is zero?". If the centre is at infinity then every part of the disc will experience angular velocity! And yet books tell you that the centre is motionless. Go figure!

Is infinity truly the right expression for the centre? We never reach infinity and yet the centre or axis "point" must be there?
I suppose it is the same for any "point"on a scale. The actual position itself doesn't have a dimension. It does on our steel rule or tape, so that we can see it. But in the theoretical sense it doesn't.

Weird!

Fascinating.

Blimey corvus, if you think that's weird what about time? We like to split time up into chunks, the same way we do with distance (space). So just how small a fraction is "now"?

Posted: **Fri Feb 13, 2015 8:08 am**

Corvus wrote:
Corvus wrote:
Corvus wrote: It's a very weird place!

Dimensionless, except for length (unless it is an infinitely thin disc! )

Going back to my question "is there any place on a spinning disc or shaft where the angular velocity is zero?". If the centre is at infinity then every part of the disc will experience angular velocity! And yet books tell you that the centre is motionless. Go figure!

Is infinity truly the right expression for the centre? We never reach infinity and yet the centre or axis "point" must be there?
I suppose it is the same for any "point"on a scale. The actual position itself doesn't have a dimension. It does on our steel rule or tape, so that we can see it. But in the theoretical sense it doesn't.

Weird!

Fascinating.
Blimey corvus, if you think that's weird what about time? We like to split time up into chunks, the same way we do with distance (space). So just how small a fraction is "now"?

Er........

Posted: **Wed Mar 04, 2015 9:08 pm**

A perfect cone. Just how narrow is the very tip. Infinity? Or zero?

Somebody ought to take a look at these bloody axioms. They need sorting out.

Posted: **Wed Mar 04, 2015 10:44 pm**

Ah - but which way up is the cone?.............
And does it really matter?

Posted: **Thu Mar 05, 2015 6:35 am**

SP250 wrote:Ah - but which way up is the cone?.............
And does it really matter?

The pointy end.

I'm imagining a representation of a cone rather than a solid, so I guesss it could equally apply to a triangle. I'm using perfect lines, so they'd be infinitely thin. If we follow the cone to the end then continue on, then at some point the cone won't be there. But at that instant, how small is the pointy bit?

it seems to be both infinity and zero!

You can tell I'm no mathematician.

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Torque