Recent content by sneakycooky

  1. sneakycooky

    Biology MCQ-Localization of recessive alleles on Polytene chromosome

    I'm also late. I agree that the question is confusing in its designations. I didn't understand until I figured out that the bands (Del 1, etc.) represent which alleles will be wild-type. From there it is just a logic puzzle where you connect each allele position (1, 2, etc.) to the allele itself...
  2. sneakycooky

    Chemistry What precipitates form by mixing 2 saturated solutions?

    Interesting! I think I understand. Hydroxide concentration could be much higher, but it is the metal ions that are unstable in water (leading to a low Ksp for both salts). If say 1 L of each saturated solution is combined, the concentration of each metal is halved, and neither will precipitate...
  3. sneakycooky

    Chemistry What precipitates form by mixing 2 saturated solutions?

    At first I thought it was C. A few sources agree with me. The book says D is correct. Here was my reasoning for C: With both salts having a formula of MX3, their [OH-]'s can be compared according to their Ksp values. Tl(OH)3 has a smaller Ksp, so it has a smaller [OH-] at saturation than...
  4. sneakycooky

    Is this a good alternative definition of electron affinity?

    Interesting. I think I agree with you; the trend of increasing the system's stability upon gaining an electron does exist, but it is much more difficult to measure; the more precise measurement makes for a better definition. I am glad that the trend actually exists, as it does help my...
  5. sneakycooky

    Is this a good alternative definition of electron affinity?

    traditional definition of electron affinity: the amount of energy released by an element in its gas form when gaining an electron second definition?: the stability gained by an element in its gas form when gaining an electron (e.g. halogens are more stable after gaining an electron, and when...
  6. sneakycooky

    The relationship b/w infrared, temperature, and electron excitation

    Ahh so temperature is applies to not only electrons, but whole atoms. I knew this at some point, but in trying to integrate new information it got buried. Your uneasy feeling was also correct. I read up some on this; I understand a little better but I might still be wrong. EM radiation is...
  7. sneakycooky

    The relationship b/w infrared, temperature, and electron excitation

    So this means an electron's excitation is associated with the vibrational state of the bond/orbital. I think this sounds similar to increasing the amplitude, but maybe I pulled that phrase out of nothing. A specific wavelength of photon absorbed corresponds to a specific quanta of energy that a...
  8. sneakycooky

    The relationship b/w infrared, temperature, and electron excitation

    That makes sense, because there isn't any logical reason that an IR camera would be able to only detect emission but not reflection. I think that the reason animals show up so well in IR is because they use lots of cellular respiration, which must produce some IR, as it is exothermic. I guess...
  9. sneakycooky

    The relationship b/w infrared, temperature, and electron excitation

    at 298 K, kT is 4.11E-21 J this is a molecule's thermal energy at room temperature at 6000 K, kT is 8.28E-19 J this is the energy that molecules in the sun's photosphere are at to emit visible light (about 20x more energy than room temperature, which is unreasonably high to account for...
  10. sneakycooky

    The relationship b/w infrared, temperature, and electron excitation

    Ok for the bonus I see now that an atomic emission spectrum could be used if the initial and end excitation states are known. Similar examples are the Lyman series and Paschen series for hydrogen.
  11. sneakycooky

    The relationship b/w infrared, temperature, and electron excitation

    Homework Statement:: 1. Does the increase in kinetic energy in (for example) water that results from increasing its temperature result from electron excitation (i.e. increasing electron energy levels) or simply increasing their velocity or vibration amplitude/frequency? 2. If excitation is...
  12. sneakycooky

    Find the charge q(t) for an LC circuit

    Ahhh thanks I see it now. Qo = Qocos(0) so with those conditions theta must be zero. Thank you :)
  13. sneakycooky

    Find the charge q(t) for an LC circuit

    Homework Statement An LC circuit consists of an 82 mH inductor and a 17 microfarad capacitor that initially carries a 180 microC charge. The switch is open for t < 0 and is then closed at t = 0. a. Find the frequency of the resulting oscillations. b. At t = 1 ms, find the charge on the...
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