981 replies to this topic

[Kiririn-shi]

Yes, originally, it is this definition. Now, howver, the most used definition is just: a Gaussian process that have min(s,t) as covariance (Bs and Bt being two brownian motions)63. What is the heaviest dinosaur? (1 point)Score Board:sum41rocksandrolls-51Pompous Pom-poms-19Odorskeut- 17E�rendil- 13Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[Kiririn-shi]

heaviest animal was the blue whale) that was already a question

I know ^_^Correct answer anyway.64. What is the study of insect called? (2 points)Score Board:sum41rocksandrolls-52Pompous Pom-poms-19Odorskeut- 17E�rendil- 13Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[Kiririn-shi]

Correct.65. What is the characteristic of spectral sodium lamp? (3 points)Score Board:sum41rocksandrolls-54Pompous Pom-poms-19Odorskeut- 17E�rendil- 13Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[E�rendil]

Light is only yellow in those lamps, opposing visible light, which has every color in the spectrum.

[Kiririn-shi]

Your answer is correct but I need more precision about this yellow, because it's not a common yellow.

[E�rendil]

I think it doesn't diffracts as normal light does... but I'm not sure how this happens

[Kiririn-shi]

Ok, 1 point for each but you didn't give me the characteristic feature of this spectral lamp.Actually it has two discrete yellow rays that are very close, and not a continuous spectrum. What is claaed spectral lamps are discrete spectrum light emitting lamps.66. What is the deepest abyss on Earth? (1 point)Score Board:sum41rocksandrolls-55Pompous Pom-poms-19Odorskeut- 17E�rendil- 14Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[E�rendil]

The Mariana's in the Atlantic Ocean is the deepest.

[Kiririn-shi]

Correct answer but it's in the Pacific ocean.67. In which domains does classical mechanics not apply and which theories replace it? (3 points)Score Board:sum41rocksandrolls-55Pompous Pom-poms-19Odorskeut- 17E�rendil- 15Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[E�rendil]

Classical mechanics only apply to not very small objects, with an average mass and which move to a not very high velocity (ompared to light speed).For very small particules and very little mass, there are the Quantum Mechanics and Quantum Field Theory. For great objects with great velocity is the Special Relativity, and for great objects with great mass and velocity is the General Relativity.

[Kiririn-shi]

Can't be more accurate.68. What is the lord name of Thomson? (1 point)Score Board:sum41rocksandrolls-55Pompous Pom-poms-19E�rendil- 18Odorskeut- 17Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[Kiririn-shi]

Correct.69. Who is the father of the evolution theory? (1 point)Score Board:sum41rocksandrolls-56Pompous Pom-poms-19E�rendil- 18Odorskeut- 17Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[E�rendil]

Its father is Charles Darwin.

[Kiririn-shi]

Correct.70. What is the Langevin twins paradox? (3 points)Score Board:sum41rocksandrolls-56E�rendil- 19Pompous Pom-poms-19Odorskeut- 17Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3Kewne-2random dude-2simbot15-2lumba-1

[xenos219]

it basically states that if twin beings begin at one spot and one moves around the globe at the speed of light and return to the place it began it will be younger than the one that remained at that position

[Kiririn-shi]

Well, that's the idea but there is no paradox for now, can you complete the story and tell me why there is a paradox?

[xenos219]

This appears to be a paradox because according to relativity either twin may validly claim to be "at rest", and thus each expects that the other twin will age slowly. This happens because one twin undergoes acceleration while the other does not

[Kiririn-shi]

Exact.71. Who first introduced the concept of heliocentrism during the Antiquity? (2 points)Score Board:sum41rocksandrolls-56E�rendil- 19Pompous Pom-poms-19Odorskeut- 17Amnesiac-12aschen-10hackerx-100 vert 0-9Monomer-9DVS_2006-8timvdp1-6Mirai Naza- 5Escaler-3Simbird-3xenos219-3Kewne-2random dude-2simbot15-2lumba-1

[Kuisanagi]

I believe Aristotle was the first to suggest it, though Helaclides actually expanded and made calculations...going further back, several Sanskrit texts suggested the idea of a stationary sun...

[Kiririn-shi]

I may be wrong but I learned during Ancient Greek courses that the answer to this question is not one of the names you mentioned. Are you sure about your reply?

[Kuisanagi]

Well...I guess I was being vague. Aristotle had the idea, but rejected it himself, and advocated geocentrism...and Helaclides didn't come up with the kind of heliocentrism we are familiar with [I think, some complicated system of various things orbiting other things in circular orbits]. Perhaps the first more concrete proposal that you refer to was made by Aristarchus? [My memory of Ancient Greek history isn't too great].