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ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am
Posts: 3675
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 Re: The O/T thread! Joolz, even Einstein knew when to introduce the fudge factor...  Joolz wrote: ken wrote: Joolz, even at the top of Mt. Everest (8.848 km up) the reduction in gravitational pull is only 0.28%... You have to go up as high as the International Space station (400 km) before gravitational pull is reduced to 90% of that on the Earth's surface. Joolz wrote: I believe that weight does decrease with altitude, although mass will of course remain constant. Not as a result of anything to do with the air, but because weight is dependant on the gravitational pull of the earth, the further you get from the earth the less that pull will be. Ok then, based on those figures, and assuming the base of the tower is at sea level, then I calculate the reduction in gravitational pull at the top of a 3.6km tower to be 0.114%. As the gravitational pull will vary slightly for every block, for the sake of the calculation, lets say the overall reduction for the whole tower is 0.114 ÷ 2 = 0.057%. Therefore the tower which we thought would weigh 432kg, will only weigh 431.754kg, a deficit of 246 grams, and equivalent to 213.6 bricks, which would add over 2 meters to the top of the tower. Whether that would be cancelled out by the ones at the bottom being compressed I'm not sure, who knows youngs modulus for a lego brick? 
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| December 5th, 2012, 10:22 pm |
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Joolz
Firing on two.
Joined: January 5th, 2009, 5:48 am
Posts: 1687
Location: Haven't a clue
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Re: The O/T thread! I think a 2 metre tower of lego is significant, you would too if you had it in the living room. Just be thankful I didn't use more than 3 decimal places. 
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| December 5th, 2012, 10:28 pm |
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ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am
Posts: 3675
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Re: The O/T thread! Well, you asked for this, so dig out that calculator... Acrylonitrile Butadiene Styrene (ABS) Density: 1.06 g/cm3 Young's Modulus: 1.90 GPa Poisson's Ratio: 0.41 I should be back from the pub around 11.30, can't miss out on the chance of celebrating the arrival of George (#1 grandchild, 7lb 14 oz without his little cotton socks.  ) Joolz wrote: I think a 2 metre tower of lego is significant, you would too if you had it in the living room. Just be thankful I didn't use more than 3 decimal places.
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| December 5th, 2012, 10:42 pm |
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dave 411
Firing on two.
Joined: August 19th, 2010, 10:44 pm
Posts: 1815
Location: Cardiff
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Re: The O/T thread! Snap Ken,I am awaiting my first Grandchild,its a girl,and she will be called Lily,due any time now,well,the next few days  .She will be brought up to be taught all things Citroen . Anyway,congratulations to you and your family  .
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[img]http://i1207.photobucket.com/albums/bb480/alastairsmith999/dave411-5.png[/im
g]Horizontally Opposed
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| December 5th, 2012, 10:53 pm |
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Jonathan
Firing on two.
Joined: January 1st, 2009, 7:37 pm
Posts: 4708
Location: Disunited Kingdom
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Re: The O/T thread! Congratulations to you both and to your respective sons/daughters, their spouses, their parents-in-law, the new born grandson and the soon to be born granddaughter. Phew!
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1988 built (1989 F-registered) Citroën 2CV-Six
2013 (63-Plate) VW Golf SE 1.4TSI BMT DSG7
1932 Morris Minor Open Two-Seater (The £100 car).
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| December 5th, 2012, 11:13 pm |
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J-dub
Aircooled Idiot
Joined: April 24th, 2010, 10:01 am
Posts: 5733
Location: Location Location
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Re: The O/T thread! Jonathan wrote: Congratulations to you both and to your respective sons/daughters, their spouses, their parents-in-law, the new born grandson and the soon to be born granddaughter. Phew! a mouthful!!! congrats ken and dave!!
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1988 2cv 652cc
1993 Toyota Hilux Surf 3000cc runs on Bio Diesel
2004 Toyota Landcruiser Amazon 4200cc runs on Bio Diesel
1998 Daihatsu Hijet 1300cc
2005 Susuki Bandit 650cc
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| December 5th, 2012, 11:14 pm |
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Jonathan
Firing on two.
Joined: January 1st, 2009, 7:37 pm
Posts: 4708
Location: Disunited Kingdom
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Re: The O/T thread! Jameswallace wrote: Jonathan wrote: Congratulations to you both and to your respective sons/daughters, their spouses, their parents-in-law, the new born grandson and the soon to be born granddaughter. Phew! congrats ken and dave!! Said the vicar to the tart.
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1988 built (1989 F-registered) Citroën 2CV-Six
2013 (63-Plate) VW Golf SE 1.4TSI BMT DSG7
1932 Morris Minor Open Two-Seater (The £100 car).
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| December 5th, 2012, 11:18 pm |
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Joolz
Firing on two.
Joined: January 5th, 2009, 5:48 am
Posts: 1687
Location: Haven't a clue
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Re: The O/T thread! ken wrote: Well, you asked for this, so dig out that calculator...
Acrylonitrile Butadiene Styrene (ABS)
Density:
1.06 g/cm3
Young's Modulus:
1.90 GPa
Poisson's Ratio:
0.41
Oh arse, I was hoping he wouldn't. I'm going to claim that I don't know the cross sectional area of a lego brick, and although I think there are some around here somewhere, and also a vernier caliper, I don't have any scales with which to identify the type of block weighing 1.152g, on which the calculations are based. Although as we know the weight, density, and height, we could work out the average cross sectional area. I don't think that would help though as the important cross section is through the walls, the top surface isn't under any pressure. Oh and congrats on the little people to both of you, and to anyone else to whom it may apply.
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| December 5th, 2012, 11:49 pm |
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Smiffy
Firing on two.
Joined: October 23rd, 2009, 10:41 pm
Posts: 2356
Location: Worcestershire
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Re: The O/T thread! Great news, Ken! Congratulations to you and your family!
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| December 6th, 2012, 12:09 am |
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Saurus
Firing on two.
Joined: March 25th, 2012, 6:11 pm
Posts: 165
Location: Lodz, Poland
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Re: The O/T thread! Also compression of plastics is hardly linear like that of metals. Almost tempted to make a project out of this, for the FEM class I attend at my uni Congratulations Ken and Dave!
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| December 6th, 2012, 12:12 am |
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