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[Edisi Kimia] minta tolong sapa2 yang terer (kimia nukleus)

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Post time 20-11-2013 04:32 PM | Show all posts |Read mode
salam...

iols nie dah berbelas tahun tak belajar kimia...jadi i nak tnya sapa2 leh tolong i buat soklan nie??

many thanks


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Post time 20-11-2013 04:42 PM | Show all posts
sooalan ni adik yg dpat hadiah minikuper pun leh jawabkan..
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 Author| Post time 20-11-2013 04:44 PM | Show all posts
capkapak posted on 20-11-2013 04:42 PM
sooalan ni adik yg dpat hadiah minikuper pun leh jawabkan..

so meh tolong i jawab kalo soklan nie stended UPSR
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Post time 20-11-2013 04:51 PM | Show all posts
dah lama buang sekolah dah xreti dah
tapi klu sains biologi dan kekeluargaan aku masih trer lagi
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Post time 20-11-2013 04:53 PM | Show all posts
soalan no 3 mcm cilaka
pembuat soalan sgt PPRT kah sampai xreti tekan butang space?


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 Author| Post time 20-11-2013 04:55 PM | Show all posts
AbukRokok posted on 20-11-2013 04:53 PM
soalan no 3 mcm cilaka
pembuat soalan sgt PPRT kah sampai xreti tekan butang space?

sebenarnya semua soklan dia takder space..

iols rasa lecturer nie pemalas....cut and paste jer...

i dah buat unit 1 sampai 5...

sampai unit 6 nie i tak ingat dah...lagipun tgk soklan pun i dah malas....pening
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Post time 24-11-2013 01:09 AM | Show all posts
sesenang jah nk jawapan
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 Author| Post time 25-11-2013 08:35 AM | Show all posts
chewan posted on 24-11-2013 01:09 AM
sesenang jah nk jawapan

kihkihkih...

biasa lah...

btw, iols dah ada jawapan..

hasil study over the weekend...

p/s cian iols, org lain yang kene exam, iols yang kene study...
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Post time 5-12-2013 05:46 PM | Show all posts
soalan no 2 tu.. pb 214 jdk bismuth 214= beta decay=half life 26.8 minute.. (habis cepat so radioactive tinggi)-dangerous
                        polonium 210 jdk pb 206 =alpha decay = half life 138.3 days (habis lambat so radiactive rendah)

soalan no 3 tu.. pukul 6 ptg jumaat ada 1 g..lepas 6 jam tinggal 0.5 g..lepas 6 jam tinggal 0.25 g..lepas 6 jam tinggal 0.125g..lepas 6 jam pada hari sabtu pukul 6 petang tinggal 0.0625g.. Last edited by tinker_bell on 5-12-2013 05:48 PM

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Post time 5-12-2013 05:56 PM | Show all posts
soalan satu..isotope Y.. Pb 210.. half life 164 microsecond.. meaning polonium tu tak stable..very dangerous
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Post time 6-12-2013 03:17 PM | Show all posts
Soalan 3

Secara logik:

Jumaat 6 petang sampai Sabtu 6 pagi = 12 jam, dua kali half life

Jisim asal 1 g, lepas 6 jam jadi 0.5 g, lepas 12 jam jadi 0.25 g (6 pagi Sabtu)

Kalau nak guna persamaan pun boleh, tapi soalan ni simple sangat, tak perlu guna persamaan. Kalau dia tanya jisim pada pukul 8 pagi, ha ni kena guna persamaan yang ada radioactive exponential decay
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Post time 6-12-2013 03:20 PM | Show all posts
tinker_bell posted on 5-12-2013 05:46 PM
soalan no 3 tu.. pukul 6 ptg jumaat ada 1 g..lepas 6 jam tinggal 0.5 g..lepas 6 jam tinggal 0.25 g..lepas 6 jam tinggal 0.125g..lepas 6 jam pada hari sabtu pukul 6 petang tinggal 0.0625g..

Err...Soalan dia sampai Sabtu 6 pagi je....

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Post time 10-1-2014 04:52 PM | Show all posts
kira dah setel la ek..k
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 Author| Post time 13-1-2014 09:12 AM | Show all posts
jefri90 posted on 10-1-2014 04:52 PM
kira dah setel la ek..k

dah...

nanti ada masa iols tepek kat sini cara penyelesaian nya...

btw, markah kimia rendah la tahun nie...(tahun 2013, result kluar tahun 2014)

otak dah berkarat kut~
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Post time 20-3-2014 03:09 AM | Show all posts
1. sampaikesudahtakadasolutionyanghendakditepeknyaitu

2. cikgukamuitupunyapapankekunci selayaknyadihantarkedaibutangspacebarnyasudahrosak
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Post time 22-3-2014 03:00 PM From the mobile phone | Show all posts
baru nak join berkimia
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