Zgodba o Nielsu Bohru

Prebral sem ... Ali lahko ... ?
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paparaco
Prispevkov: 58
Pridružen: 14.11.2005 9:57

Zgodba o Nielsu Bohru

Odgovor Napisal/-a paparaco »

Sicer ni ravno neka znanost, ampak zanimiva zgodbica. Verjetno ste je zo prej prebrali.
Zanima me ali imate kaksno podobno anekdoto iz "pravega" zivljenja, da je kdo "bil pameten" kot ta student v omenjeni zgodbi.
During a physics exam one day, young Niels Bohr was asked to "describe how to determine the height of a skyscraper with a barometer."

"You tie a long piece of string to the neck of the barometer," he replied, "and lower the barometer from the roof of the skyscraper to the ground. The length of the string plus the length of the barometer will equal the height of the building."

This answer so incensed the examiner that Bohr did not pass his exam. When he appealed, the university appointed an independent arbiter to decide the case. The arbiter concluded that the answer was correct but did not display any knowledge of physics. Bohr was called in and given six minutes to provide a proper answer.

For five minutes he sat in silence, thinking. When the arbiter reminded him that time was running out, Bohr replied that he had several solutions, but could not decide which to use. At last, he gave this reply:

"You could take the barometer up to the roof of the skyscraper, drop it over the edge, and measure the time it takes to reach the ground. The height of the building can then be worked out from the formula H = 0.5g x t squared.

"Or if the sun is shining you could measure the height of the barometer, then set it on end and measure the length of its shadow. Then you measure the length of the skyscraper's shadow, and work out the height of the skyscraper using proportional arithmetic.

"You could also tie a short piece of string to the barometer and swing it like a pendulum, first at ground level and then on the roof of the skyscraper. The height is worked out by the difference in the gravitational restoring force T = 2 pi sqroot (l / g).

"If you merely wanted to be boring and orthodox about it, you could use the barometer to measure the air pressure on the roof of the skyscraper and on the ground, and convert the difference in millibars into feet to give the height of the building.

"But the best way would be to knock on the janitor's door and say, 'If you would like a nice new barometer, I will give you this one if you tell me the height of this skyscraper!'"

ZdravaPamet
Prispevkov: 2842
Pridružen: 16.8.2004 19:41

Odgovor Napisal/-a ZdravaPamet »

Uh, takih sem doživel že precej. Večinoma sicer iz ust kakih profesorjev, eno pa se spomnim še iz srednje šole. Da jo povem (zelo je podobna Bohrovi). Pet nas je prišlo na vaje iz fizike, vaja se je imenovala "merjenje g-ja". Imeli smo na razpolago težko kroglo, vrv in stojalo. Večina nas je naredila preprosto nihalo in izračunala g (težni pospešek) preko dolžine vrvi in nihajnega časa krogle. Ha! V kotu je bil genij! Ta je kroglo spuščal na tla in računal g iz višine spusta in časa potovanja. To je bilo v drugem letniku, ko sem spoznal, kako hecna je včasih fizika.

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