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(3,704 posts)tblue37
(65,490 posts)Retired Engineer Bob
(759 posts)rsdsharp
(9,208 posts)Phoenix61
(17,019 posts)Tanuki
(14,923 posts)reACTIONary
(5,788 posts)... Stairway to Heaven? I thought that was pretty aggressively protected.
scipan
(2,361 posts)My mind ^
eppur_se_muova
(36,301 posts)degrees of phase in each cycle, until eventually it is 360, then 720, then 1080 degrees ahead -- which all look the same as being in-phase. Past the halfway mark of the cycle, say, 300 degrees behind looks the same as 60 degrees ahead.
Someone fine-tuned the lengths of those strings very carefully, so that the ratios of their lengths are as close as possible to the ratio of the squares of successive integers. (The period of a pendulum is proportional to the square root of its length.)
So the second shortest pendulum is, say, (52/51)^2 times the length of the shortest, the next longest is (53/51)^2 as long, etc. up to (65/51)^2. When the shortest has swung through 65 cycles, the next shortest will have swung through 64, etc., all the way down to 51.
scipan
(2,361 posts)I was actually not realizing they were acting completely independently.
The period of a pendulum is proportional to the square root of its length.
Sogo
(4,997 posts)....not that I actually followed, but still, amazing....
alfredo
(60,077 posts)Last edited Thu Aug 5, 2021, 09:57 AM - Edit history (1)
yonder
(9,679 posts)alfredo
(60,077 posts)Big fan of Pina
Iggo
(47,574 posts)Last edited Sat Aug 7, 2021, 09:46 AM - Edit history (1)
I didnt even notice til almost two minutes in.
(When a girl is twirling, nothing else matters.)
TexasBushwhacker
(20,220 posts)by keeping the length of the pendulums the same but having balls that were lighter and heavier.
eppur_se_muova
(36,301 posts)(At least neglecting friction and air resistance.)
https://en.wikipedia.org/wiki/Pendulum_(mathematics)#Rule_of_thumb_for_pendulum_length
burrowowl
(17,653 posts)onethatcares
(16,192 posts)I really like "Stairway to Heaven".....never though I'd hear it played on the piano..
2naSalit
(86,822 posts)That was a cool display of the energy forms on the planet or something. I wonder how they went about deciding which colors were place in what place in the lineup of the spheres.
krispos42
(49,445 posts)Upthevibe
(8,075 posts)Amazing!
Stuart G
(38,449 posts)Ocelot II
(115,879 posts)See the explanations elsewhere in this thread.
3catwoman3
(24,055 posts)...on your desk?!