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yoga3105

Oktober 22, 2014, 11:23:42 PM
tolong buatin program bahasa c++ nya gan, yang bisa tak ksih pulsa

Kutip
X(pangkat)5-y(pangkat)4+a=d

 

Sandy_dkk

Oktober 21, 2014, 12:31:18 PM
coba periksa ke ahli syaraf kang farabi.
 

Farabi

Oktober 21, 2014, 11:29:44 AM
Tiap menjelang musim hujan sakit gigi, padahal giginya udah ga ada. Apa ini memang menimpa semua orang? Dan kenapa?
 

Sandy_dkk

Oktober 20, 2014, 05:16:25 AM
hujan turun untuk pertamakalinya dalam beberapa bulan ini, disambut bahagia oleh lusinan burung gereja yang berterbangan di halaman rumah. sungguh indah pagi ini.

senifacitra

Oktober 14, 2014, 08:24:03 PM
malam, mw tx proses fisika apa yang menyebabkan sehingga bumi memiliki sifat magnet.??

mohon bntuanx sgera
 

Sandy_dkk

Oktober 13, 2014, 08:08:28 PM
boleh deh...

sherenhfns

Oktober 13, 2014, 06:59:24 PM
ada yang on ga ? bisa bantuin soal matematika kelas 9? besok mau mid

sherenhfns

Oktober 13, 2014, 06:58:49 PM
Hallo

 

Monox D. I-Fly

Oktober 09, 2014, 09:34:41 PM
musim pemilu juga sudah habis, liat aja, pemilu tahun ini nggak ada yang bahas pemilu sama sekali... forsaintis dah bosen sama politik...
 

Farabi

Oktober 09, 2014, 01:25:15 PM
Capek debat adu khayal ala agama. Mendingan fokus ke hal hal exact.  ;)

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Penulis Topik: Unsolved problems in chemistry  (Dibaca 57727 kali)

0 Anggota dan 1 Pengunjung sedang melihat topik ini.

alinc

  • Pengunjung
Unsolved problems in chemistry
« pada: Januari 25, 2007, 11:43:30 AM »
sekedar info saja yah  ;)
nanti untuk bahasan bisa melalui topik yang akan dibuat


Unsolved problems in chemistry

Unsolved problems in chemistry tend to be questions of the kind "Can we make the X chemical compound?" and are solved rather quickly, but here are some persistent questions with deep implications:

    * Solvolysis of the norbornyl cation: Why is the norbornyl cation so stable? Is it symmetrical? This problem has been largely settled for the unsubstituted norbornyl cation, but not for the substituted cation.
    * On-water reactions: Why are some organic reactions accelerated at the water-organic interface?
    * Better-than perfect enzymes: Why do some enzymes exhibit faster-than-diffusion kinetics? See: Enzyme kinetics.
    * Feynmanium: What are the chemical consequences of having an element (137) whose electrons must travel faster than the speed of light? Problem actually occurs at Element 139 (eka-actinium/dvi-lanthanum), since “A complete analysis involving relativity reduces the speed of electrons, therefore allowing stable 1s orbits in the element 138 (Uto).”
    * Protein folding problem: Is it possible to predict the secondary, tertiary and quaternary structure of a polypeptide sequence based solely on the sequence, and environmental information? Inverse protein-folding problem: Is it possible to design a polypeptide sequence which will adopt a given structure under certain environmental conditions?
    * What is the origin of homochirality in amino acids and sugars?
    * Do sterics (electronic repulsion) or electronics (electronic polarization) have a greater effect on chiral induction in stereospecific and stereoselective chemical reactions?
    * How can electromagnetic energy (photons) be efficiently converted to chemical energy? (E.g. splitting of water to H2 and O using solar energy.)
    * What are the chemical origins of life? How did non-living chemical compounds generate self-replicating, complex life forms?
    * How does the flow of elements, energy, and electrons (oxidation states) drive the structure of local and global ecosystems?
    * What is the origin of the bond rotation barrier in ethane, steric hindrance or hyperconjugation?



mr.zero

  • Pengunjung
Re: Unsolved problems in chemistry
« Jawab #1 pada: Januari 29, 2007, 09:27:44 PM »

    * Feynmanium: What are the chemical consequences of having an element (137) whose electrons must travel faster than the speed of light? Problem actually occurs at Element 139 (eka-actinium/dvi-lanthanum), since “A complete analysis involving relativity reduces the speed of electrons, therefore allowing stable 1s orbits in the element 138 (Uto).”
whaaa yg ini baru denger yang ini aja yg di post yah  ::)

alinc

  • Pengunjung
Re: Unsolved problems in chemistry
« Jawab #2 pada: Januari 31, 2007, 09:41:47 PM »
@mimin
hehehe tq tq .

@mr.zero
sesuai permintaan itu yang pertama bro

astronomsableng

  • Pengunjung
Re: Unsolved problems in chemistry
« Jawab #3 pada: Januari 24, 2008, 03:52:12 AM »
Unsolved problems in chemistry

Unsolved problems in chemistry tend to be questions of the kind "Can we make the X chemical compound?" and are solved rather quickly, but here are some persistent questions with deep implications:

Bagaimana membedakan problem2 ini dengan problem2 dalam fisika nuklir/zat padat? Kayaknya kok mirip2 pertanyaan fisika ya  ???

Offline peregrin

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Re: Unsolved problems in chemistry
« Jawab #4 pada: Januari 24, 2008, 04:44:05 AM »
Kayaknya kok mirip2 pertanyaan fisika ya  ???


lho katanya katanya Feynmann: "All theoretical chemistry is really physics; and all theoretical chemists know it." .... hehhehe  ;D

sotoy gw  ;D
« Edit Terakhir: Januari 24, 2008, 04:44:40 AM oleh peregrin »
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Offline A

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Re:Unsolved problems in chemistry
« Jawab #5 pada: April 06, 2013, 11:27:41 PM »
Ini nanya atau ngasih tau ya maksudnya??? -_-

Offline biobio

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Re:Unsolved problems in chemistry
« Jawab #6 pada: April 07, 2013, 07:07:57 PM »
lho katanya katanya Feynmann: "All theoretical chemistry is really physics; and all theoretical chemists know it." .... hehhehe  ;D

sotoy gw  ;D

Saya setuju. :D

Ini nanya atau ngasih tau ya maksudnya??? -_-

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