Recent content by zachnorious

  1. Z

    How Are Electrons Distributed Among Px, Py, and Pz Orbitals in Carbon?

    I mean since px,py,pz have the same energy is there any other rule that tell us how many electrons are in each p (px,py,pz) or is this different from element to element and each one has a characteristic px,py,pz for no specific reason?
  2. Z

    How Are Electrons Distributed Among Px, Py, and Pz Orbitals in Carbon?

    Hello I didn't get something about the AO. i.e the electron configuration of C is 1s² 2s² 2p² . So we know that at the 2nd shell this has 4 electrons, 2 in s orbital + 2 in the p, right? How do we find out how the 2 electrons of p are spread in the px, py, pz? Thank you, Panos
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    Calculating Sidereal Time for a Star's Upper Culmination at a Given Location

    Thank you all for your help :) Yes it says so in the book, that this is no more of use, but we still have to learn it. Is this not being taught anymore at the us universities in the introductory astronomy lesson?
  4. Z

    Calculating Sidereal Time for a Star's Upper Culmination at a Given Location

    So the answer is ST(Thessaloniki)= \alpha + H ST= \alpha + 0 ST= 1h25m18s ? [SIZE="1"] -edit- I changed the alpha letter with a latex one, because I typed it before (i'm greek so I have an eng/gr keyboard) without thinking that you won't be able to see it. Sorry if it caused any mess.
  5. Z

    Calculating Sidereal Time for a Star's Upper Culmination at a Given Location

    I have a little knowledge about all that, but I don't think I have fully understood them. For example, when we say that a star has α=1h25m18s we mean that this star is at it's upper culmination on the meridian that is about 20° east of Greenwich or something? Maybe what I'm saying is completely...
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    Calculating Sidereal Time for a Star's Upper Culmination at a Given Location

    1. Homework Statement It's a very simple (I guess) astronomy problem but I have no idea how to start and what to do, so please show me something. One star Σ has (right ascension) α=1h25m18s. What is the (sidereal time) ST at Thessaloniki (φ=40.5°, λ=-23°) when the star is at its upper...
  7. Z

    Can someone help me solve the integral of (tan x)^(1/2)?

    Thank u all very much. :) With ur suggestions I got it until 2\int(\frac{u^2}{1+u^4}du but then, stuck :p I'm goin to see the solution now, thnx Gib for the link
  8. Z

    Can someone help me solve the integral of (tan x)^(1/2)?

    Can please anyone show me how to solve the integral of (tan x)^(1/2) ? (integral of the square root of tangent) Thank you in advance, Panos I can't do anything else than the obvious tan=sin/cos. I really can't figure out which differentiation is giving you the sin^(1/2) * cos^(-1/2) :(
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