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July 3rd, 2017, 12:51 AM   #11
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It is very common in construction to want a line at right angles to some building line.

It is also very common for angle measuring equipment to be unavailable.

I can't think why a line at 45 degrees might be wanted, but if this were the case I would set out the line using a tape and integer right angled triangles as already indicated.

Along given line AB set in peg C at 3metres.
Using two tapes from A and B or one flexible tape in a complete triangle, set out points D and E at right angles to AC and 4m offset. (thus the third side is 5m)
set in pegs F and G along AD and CE at 3m and confirm the distance FG is 3m
The diagonals AG and CF will be at 45 degrees.
If I needed a 45 template for roofing timbers I would just mark out a convenient square on a piece of ply and cut it diagonally in half.
The last thing I would want would be calculations and values to umpteen decimal places.

Last edited by studiot; July 3rd, 2017 at 01:42 AM.
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July 3rd, 2017, 04:03 AM   #12
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There is no separation .....

Well, now you talked like a mathematician who is also a physicist.
There is no separation between geometry, physics, and mathematics.
Therefore, it seems to me very natural to offer geometric measurement.
But not everyone gets it.
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July 3rd, 2017, 04:33 AM   #13
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Quote:
Originally Posted by aetzbar View Post
Well, now you talked like a mathematician who is also a physicist.
There is no separation between geometry, physics, and mathematics.
Therefore, it seems to me very natural to offer geometric measurement.
But not everyone gets it.
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You haven't offered anything that i can see. How about do away with your examples and calculations for a second, and just try explain in words what you want to say (without posting that pdf you've been posting).
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July 3rd, 2017, 04:53 AM   #14
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Quote:
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Well, now you talked like a mathematician who is also a physicist.
Hmmmm... I'm a Physicist who does Math. Do I count?

Unless you wander into some kind of weird bubble in the cosmos you will always get a value of $\displaystyle \pi$ that, well, is equal to $\displaystyle \pi$. It's a physical constant! You can't simply wade in and change it.

(FYI: My Master's thesis was based in trying to effectively change the weak mixing angle over a small region of space-time. It failed miserably. Take it from some experience that you don't want to go around messing with constants.)

Yeah, I know. I'm not agreeing with your results so therefore I "don't get it."

-Dan
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July 3rd, 2017, 05:12 AM   #15
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Please, here's the story

Quote:
Originally Posted by Joppy View Post
You haven't offered anything that i can see. How about do away with your examples and calculations for a second, and just try explain in words what you want to say (without posting that pdf you've been posting).
I propose an experiment of measurement for a scientific institution of physics.

* Two real circles. (Steel cylinders) appear in the measurement.
The measurement should reveal a small phenomenon of inequality

Cylinder diameter to cylindrical diameter
(not equal)
to cylinder circumference to cylinder circumference.

The dramatic conclusions you can get.

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July 3rd, 2017, 05:19 AM   #16
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Please read the article

Quote:
Originally Posted by topsquark View Post
Hmmmm... I'm a Physicist who does Math. Do I count?

Unless you wander into some kind of weird bubble in the cosmos you will always get a value of $\displaystyle \pi$ that, well, is equal to $\displaystyle \pi$. It's a physical constant! You can't simply wade in and change it.

(FYI: My Master's thesis was based in trying to effectively change the weak mixing angle over a small region of space-time. It failed miserably. Take it from some experience that you don't want to go around messing with constants.)

Yeah, I know. I'm not agreeing with your results so therefore I "don't get it."

-Dan
http://img2.timg.co.il/forums/2/2357...506e265a07.pdf
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July 3rd, 2017, 05:36 AM   #17
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Quote:
Originally Posted by aetzbar View Post
I propose an experiment of measurement for a scientific institution of physics.
Okay.

Quote:
Originally Posted by aetzbar View Post
*
Not sure what this is supposed to signify.

Quote:
Originally Posted by aetzbar View Post
Two real circles. (Steel cylinders) appear in the measurement.
The measurement should reveal a small phenomenon of inequality
Yes it's likely the measuring apparatus will produce different results (within a certain error bracket depending on the apparatus and how it was manufactured etc.) for each of the circles. This is expected.

Quote:
Originally Posted by aetzbar View Post
Cylinder diameter to cylindrical diameter
(not equal)
to cylinder circumference to cylinder circumference.
I take it this means that when comparing each cylinders diameter with the other cylinders circumference, they are found to be not equal. Again, I fail to see what this is supposed to show.

So, you want to offer an institution of physics the ability to differentiate between two cylinders diameters and their circumferences?
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Last edited by skipjack; July 3rd, 2017 at 06:36 AM.
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July 3rd, 2017, 05:54 AM   #18
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I try again

In measuring inequality, there is always an error.
If the measurement is very accurate, it exceeds the error range.
Very accurate measurement, can prove inequality.
Measurement, never determines equality.

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July 3rd, 2017, 06:03 AM   #19
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Ahhhh geezzzz buddy, why don't you get an English
girlfriend (or boyfriend) to help you post in clear English?

I can see your next thread:
prove that paper shoes size 8 (like those in an asylum!)
are slightly shorter than lumbermen's size 8 boots!

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July 3rd, 2017, 06:20 AM   #20
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Note: for paper shoes in asylum, contact Joppy
if you need specifications
This weeks special: Free pair for newcomers!
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