Recent content by burningbend

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    What is the smallest frequency difference that can be detected by the human ear?

    Yeah, that's the whole thing. This is for a student I'm helping, so I didn't have access to the text while we were working, but there was absolutely no context in the questions around it. Not a clue here.
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    What is the smallest frequency difference that can be detected by the human ear?

    Homework Statement Consider two sound sources S1 with a frequency of f1 = 3367 Hz and S2 with a frequency of f2 = 3362 Hz. Determine the smallest difference in frequency from 3367 Hz that the average person can detect? Homework Equations The only thing I can think of is approximating the...
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    Synthesize 1-Butyl-3-Propylbenzene from 1-Chloropropane & 1-Butyne

    i answered this pretty clearly on chemicalforums. go check my post there.
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    Decent references for SN2 displacement of tosylate with acetylide

    meh, pretty sure i fixed it by adding 20% v/v DMSO and warming after adding the tosylate.
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    Decent references for SN2 displacement of tosylate with acetylide

    i'm having trouble finding good references for lithiating a terminal alkyne and reacting that acetylide with a tosylate, and my goto procedure didn't work. can anyone give me a hand? procedure i did try: alkyne in THF at -78 1.0 eq nBuLi added 1.0 eq tosylated phenylethanol added (color...
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    News Fox News: Fair & Balanced? Investigating Claims of Corruption

    lol every current cable news station is controlled by conservative corporate owners. there is no fairness doctrine. clear channel controls over 11% of the radio market and viacom controls over 35% of the tv market. what liberal media?
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    What Is the Major Resonance Contributor of This Organic Molecule?

    you'll probably get a migration of the double bond to the lowest bond and then migration of a lone pair from oxygen to form a double bond and make an oxonium ion
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    Organic Chem: Diels-Alder w/ Anthracene & Maleic Anhydride

    yep, you've got the right idea. you'd get side reactions with the maleic acid and ethanol to form esters. xylenes on the other hand, are virtually useless and won't react except under extreme conditions with things like acid chlorides and alkyl chlorides in friedel-crafts reactions. other...
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    Is Time Synchronous Throughout the Universe?

    captains log.. stardate 2.726 Kelvin... now imagine if you could surf on a ray of light. what would things look like? from the light's point of view, is everything perfectly still because time is moving at an infinitely small rate (or maybe even zero)? we might interpret light to take 8...
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    Organic Chemistry(functional group)

    for the most part, if you have a compound in an rbf with a bunch of like NaOH, you'll have an organic layer and an aqueous layer, so things separate naturally... not really sure what your question is though... can you rephrase?
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    How to Solve Volumetric Flow Balance Problems in Biomedical Engineering

    one other thing to note in this problem is that we're not really doing a mass balance, but a volumetric flow balance. you can ONLY do volumetric flow balances when your density is constant, otherwise you must convert each stream into a mass flow rate!
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    Chemistry What Is the Molecular Formula of C3H2O with a Molar Mass of 192.8?

    now that i think about it, the bad mass is probably due to not purifying the sample enough and using an impure sample in combustion analysis.
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    Chemistry What Is the Molecular Formula of C3H2O with a Molar Mass of 192.8?

    well yeah, that's the point, that when you divide the molecular weight by the empirical weight, you get an integer. the problem is the molecular weight given doesn't match any of the species listed.
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    Chemistry What Is the Molecular Formula of C3H2O with a Molar Mass of 192.8?

    someone's probably just an idiot and screwed something up along the way. mass specs are pretty accurate in giving molecular ions for species this small
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