The Indian Thread (TiT) # 14

International Students
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<p>

why do both of these sound a little off to me…?
what were the questions?</p>

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<p>1st question was… which isotope wud u use to date a 5000 yr old mummy …with options … 5 x 10^-3 ,5 x 10 ,5 x 10^3 ,5 x 10^5 ,5 x 10^7 ,</p>

<p>So the best wud be one with half life == 5 X 10^3</p>

<p>The 2nd question asked about a satellite orbiting the sun … … in this one actually otherwise also … the other options cud be eliminated …</p>

2703

<p>any of you guys applying ED anywhere?</p>

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<p>smartmind iam a bit skeptical about ur comet answer…see when it is approaching sun, the magnitude of its tangential velocity is increasing (according to kepler’s law)…since the magnitude of tangetial velocity is changing, there has to be a tagential accleration as well…so the net acceleration will be the RESULTANT of centrepital acceleration and the tangetial acceleration which will be pointing in the sun’s direction…more like non uniform circular motion…</p>

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<p>dexter login to your yahoo and add me.</p>

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<p>okidokie. got kinda confused for a while there…</p>

<p>dexter in an ellipse the normal at a arbitrary point doesnt necessarily pass through the focus.</p>

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<p>If u take not magnitues but in one fixed frame of comparison … then with increaesd mag also u chart them…the final value wud be same…as the COS and sin components bring down the value…as it approaches sun…coz angle increases so more cos x there fore compensting</p>

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<p>and yes …shash_rao is also perfectly right …acceleration is one towrds focus and one due to change in vel…so net will remian tangential</p>

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<p>smart u just said that nwt acc will be tangential…but earlier u said that it will be perpendicular to velocity…</p>

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<p>okay select from the image…</p>

<p>[url=<a href=“http://img413.imageshack.us/my.php?image=untitled4fi.png][img=http://img413.imageshack.us/img413/7523/untitled4fi.th.png][/url”>ImageShack - Best place for all of your image hosting and image sharing needs]

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<p>anyone…??</p>

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<p>oh…sorry soryy…i wrote tangential… i meant perpndicular…
it wud be perpendicular</p>

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<p>b .</p>

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<p>so choice (b) in the image i posted??</p>

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<p>yes .</p>

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<p>k…i get it now…</p>

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<p>damn another one wrong!!! i have 5 already…</p>

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<p>wat r others…posts them … dude</p>

<p>

</p>

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<p>k…the mummy one …i selected 5X10^-3 as i thoiught the amaller the half life the more accurate it will be…</p>

<p>the transformer one…i selected the iron core option after initially selecting the voltage in the wires one</p>

<p>the max KE of Y in the graph that was given (with X Y Z)…i selected 2ev without even calculating it…</p>

<p>then, which of the waves can undergo interference…i selected “only light waves and waves in a string”…i omitted sound waves…immediately after the test i remembered the concept of beats!!..so got scre*ed there as well!!</p>

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<p>hey vampiro
what kind of olympiads did you mean here (one ben’s blog)?</p>

<p>Shikhar wrote: “I will be giving the International Olympiad of Informatics this year. Unfortunately the results (obviously if I get selected) will come out after I think the decisions. However I do have certain national olympiads about which I can write in my app and which were in no way less competitive (in fact one was more competitive than IOI heats) so will these olympiads be an equally good indicator of my passion for computer science?”</p>

<p>I’ve participated in lots of olympiads, but I’ll probably only be writing abt the IOI, where i reached the Training Camp (it was awesome!) I haven’t seen other olympiads which are worthy to put on the MIT app, so was just curious what you meant by that. Any examples?</p>

<p>As to your question before: I visit this thread often, but find lots of random talk (no offense meant to anybody) so instead of engaging in it myself, I just ignore it and post when I have something meaningful to ask or tell.</p>

<p>Cheers</p>