Homework thread stuck? ask here

Ok here´s one. There are two trains. One from Chicago, the other from Los Angeles. They are both traveling towards Panama City, FL. The train from Los Angeles is moving at a speed so that it will reach Panama City exactly two hours before the train leaving from Chicago. Now assuming that the train from Chicago must also make a two hour layover in Knoxville, Tenn., at what time would both trains need to leave from their respective stations and at what speed would both need to be traveling in order to meet the requirement of the LA train reaching Panama City two hours before the Chicago train. <b>Hint: Assume the trains will be traveling in a straight line. </b> A cookie to anyone who gets the answer. Have fun! <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle> Edited by - Sylverfysh on 4/3/2005 9:17:54 PM

If anyone here´s a calculus expert I could use some help determining volumes of solids of revolution... oh what fun <img src=smilies/icon_smile.gif width=15 height=15 border=0 align=middle>

<font size=1 face="trebuchet ms"><BLOCKQUOTE><hr size=1 noshade>oh what fun <hr size=1 noshade></BLOCKQUOTE></font><font face=´trebuchet ms, Verdana, Arial, Helvetica´ size=2> ok let me get something straight........homework is NOT fun, at all!!!!!!!!!!!!!!!! unless you ask someone for the answers <img src=smilies/icon_smile.gif width=15 height=15 border=0 align=middle>

*Steps from shadows* Very well, I have to answer the following question for one of my Master´s assignments; Can tacit knowledge be transformed into explicit knowledge? It must be answered in the following contexts; professional, socio-cultural, theoretical, individual and group contexts. It needs to be about 2,500 words and cite at least 10 references, preferably academic journal articles. Oh, and I want it on my desk at 9am tomorrow morning! <img src=smilies/icon_smile_big.gif width=15 height=15 border=0 align=middle> Interestingly, that assignment is one of the easiest ones <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle>. *Returns to shadows still typing up assignment* Edited by - esquilax on 4/4/2005 12:13:14 AM

<font size=1 face="trebuchet ms"><BLOCKQUOTE><hr size=1 noshade> What is 1/4 multiplyied by 238 3/4 <hr size=1 noshade></BLOCKQUOTE></font><font face=´trebuchet ms, Verdana, Arial, Helvetica´ size=2> Convert the whole number into fourths (multiply by four), multiply, then convert back into whole number and fraction. OR convert the fourths into decimals and multiply. Esqy--define tacit and explicit <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle> <img src=smilies/icon_smile_big.gif width=15 height=15 border=0 align=middle> Edited by - Wilde on 4/4/2005 4:15:53 AM

<font size=1 face="trebuchet ms"><BLOCKQUOTE><hr size=1 noshade>There are two trains. One from Chicago, the other from Los Angeles. They are both traveling towards Panama City, FL. The train from Los Angeles is moving at a speed so that it will reach Panama City exactly two hours before the train leaving from Chicago. Now assuming that the train from Chicago must also make a two hour layover in Knoxville, Tenn., at what time would both trains need to leave from their respective stations and at what speed would both need to be traveling in order to meet the requirement of the LA train reaching Panama City two hours before the Chicago train. Hint: Assume the trains will be traveling in a straight line. A cookie to anyone who gets the answer. Have fun! <hr size=1 noshade></BLOCKQUOTE></font><font face=´trebuchet ms, Verdana, Arial, Helvetica´ size=2> Forgive me, for it has been some time since I did any mathematics, but with only a time difference given - it would appear you have set an impossible challenge. By definition, for speed is distance/time, you would at least need variables on how long the journey for one train takes, and the distance that is covered. Rewriting it to say &quot;I leave my house to go to my grans, and my mate leaves his house to meet me there. I want to get there 2 hours before him, but he is going to make a stop on the way for two hours. How far do we have to go, at what time do we leave, and at what speed?&quot; Simply put, stupid question. Give more details. Edited by - Spanner Monkey on 4/4/2005 5:10:20 AM

Its a joke question ive seen them before. gets someone all worked upp cause they cant asnwer it.

Furry muff, take it that anyone who actually wants help will thank the timewasters making pointless posts - which will mean that no-one will take the thread seriously, therefore not attempting to help them with any troubles. No wonder these threads never work/are a complete waste of time.

You want a real homework question? All right then, this is from my Principles of Chemistry II course. &quot;How much energy is lost or gained when a mole of cobalt-60 undergoes beta decay: 60/27 Co -----&gt; 0/-1 e + 60/28 Ni? The mass of the the 60/27 Co atom is 59.933819 amu, and that of a 60/28 Ni atom is 59.930788 amu. For reference the mass of an electron is 5.4858 x 10^-4 amu.&quot; There, a real honest homework question <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle> EDIT: I can´t place the elements in their correct form so whenever there is a &quot;#/#&quot; it´s not division, it´s simply stating that the first number is above the second. Edited by - Sylverfysh on 4/4/2005 12:29:33 PM

Do you actually need help with that, or are you showing off? If you need explanations - just say

Actually need help. I´m doing horrible in chem <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle> I know there is something about how when mass is decreased there is some sort of energy loss, but I don´t know how to set up the equation so that I can figure out how much energy is released.

It´s been a while since I´ve done chem. Think E=mc^2 Find the mass defect (the change in mass between what you had at the beginning and what you end up with), multiply by (3x10^8)^2 and that should be the amount of energy (in Joules I believe) that is produced by that reaction.

Homework eh? whats my opinion on the pope dying? i need to know by next tuesday. Kidding aside all this math stuff is beyond me... why cant we do history or something wholesome? Math is evil... _______________ i dont suffer fools gladly , in fact i dont suffer them at all

Sorry, hadn´t checked in. J Dawg is correct: A neutron is becoming a proton, electron, and an anti-neutrino. To work out the energy released during the decay, you use (as J Dawg said) E = mc^2 (I can find signs for ½ and ¼, but squared <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle>). So how can we do this? Well, we can work out the change in mass, and c is a constant (speed of light, check your books for value, as we used 2.998x10E8 m/s), and this will give us the change in energy... 59.930788 - 59.933819 = m ergo = -0.003031g (we are talking about one mole) or = -3.03x10^-6 Kg The mass decreases - this means that energy is given out... So delta E (change in energy, or the amount given out) is the change in mass multiplied by the speed of light squared (don´t forget to convert mass into kg´s instead of g´s though - so you can have the unit of joules... (remember ^ is symbolising ´to the power´) dE = (2.998x10^8) ^2 * dM This will give you the change in energy in Joules (J) Anyone see any errors, speak up - cause its been a while <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle> <img src=smilies/icon_smile_big.gif width=15 height=15 border=0 align=middle> *edit* - if you have to calculate per atom instead of per mole, just divide the mass by Avogadro´s constant = 6.022 x 10^23 atoms per mole Edited by - Chips on 4/5/2005 7:13:10 AM

I can tell you anyhting regarding history. No math I hate math.

<font size=1 face="trebuchet ms"><BLOCKQUOTE><hr size=1 noshade>what is the rounded distance of the earth from the sun at winter? fall? summer? spring?... how the !@#$ can i figure that out?? <hr size=1 noshade></BLOCKQUOTE></font><font face=´trebuchet ms, Verdana, Arial, Helvetica´ size=2> Well, the seasons are not caused by the distance from the earth to the sun - so the answer should be that its the same. If you need an explanation into what causes the seasons, and why the distance from Earth has nothing to do with it - then just say <img src=smilies/icon_smile.gif width=15 height=15 border=0 align=middle> As for math - I am no fan either <img src=smilies/icon_smile.gif width=15 height=15 border=0 align=middle> I would assume the same old method is use these days for ordering maths: BODMAS <b>b </b>rackets <b>o </b>f <b>d </b>ivision <b>m </b>ultiplication <b>a </b>ddition, <b>s </b>ubtraction. This represents the order you work through when doing these types of sums. <font size=1 face="trebuchet ms"><BLOCKQUOTE><hr size=1 noshade> 236 1/4 x 300.444 divided by (678.3 x 5) + 5 = what? ihate math! <hr size=1 noshade></BLOCKQUOTE></font><font face=´trebuchet ms, Verdana, Arial, Helvetica´ size=2> Using the above So for this, do whatever is in brackets first: (678.3 x 5) = 3391.5 Next - I am going to assume the 236 1/4 is actually 236.25 and not 236 x 1/4 236.25 x 300.444 / (3391.5) + 5 = Next, division: 300.444 / 3391.5 = 0.088 So: 236.25 x 0.088 + 5 = Multiplication: 236.25 x 0.088 = 20.79 So: 20.79 + 5 = 25.79 &lt;--- and thats your answer <b>IF </b> I have got this right. I am sure someone will correct me if I am wrong, or times have moved on <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle> Just have to split it into steps using the above BODMAS (as we called it) - which is the order the mathematical functions are carried out. Edited by - Chips on 4/6/2005 5:20:24 AM

Math IS evil. Very evil. I´m good at math, and I detest it. Speaking of evil shtuff... <font size=1 face="trebuchet ms"><BLOCKQUOTE><hr size=1 noshade> The first is that those living in pre-axial, theocratic societies in which essentially the societal structure is such that those who benefit are truly not the gods but the priests—the illuminati of the society, in a sense—would be not only approving of but eager for a religion that preached not fear and power worship, but rather liberation, morality, and the rule of moral, divine law as opposed to the rule of the tyrant <hr size=1 noshade></BLOCKQUOTE></font><font face=´trebuchet ms, Verdana, Arial, Helvetica´ size=2>... ^ Tis english homework. Blecch <img src=smilies/icon_smile_dead.gif width=15 height=15 border=0 align=middle> (--btw, Taw, I did NOT copy that off my cousin´s philosophy textbook <img src=smilies/icon_smile_tongue.gif width=15 height=15 border=0 align=middle>. Its a small portion of what we have to write for the class.) Edited by - Wilde on 4/5/2005 3:56:40 PM

The cobalt beta decay is easy, Take the difference in mass defects. That´s your E-beta-max. If they´re being sadistic and want you to remember that beta-minus decay is not a monoenergetic phenomenon, then take about one-third E-beta-max and that´s your E-beta-peak. *pokes Wilde* A period, comma, semi-colon or something might aid in comprehending that sentence. <img src=smilies/icon_smile_wink.gif width=15 height=15 border=0 align=middle> *pokes all* I want to back-compute a matrix from chosen eigenvectors. Edited by - Hahukum Konn on 4/5/2005 4:09:55 PM