not all tuition offer free trial class before actually signing up, at zero cost… but can be able to help find one for a Sec and JC, I can send you PM for the details.

in my opinion, no. the marriage may end in paper but it is really hard for the kids. and your relationship to other people close to you , as couple, could also change. hmm… can watch the k-drama world of married couple. i think the plot is realistic!

chaocheng12\" post_id=\"1978992\" time=\"1591012814\" user_id=\"185205:

leeh40\" post_id=\"1978968\" time=\"1591004063\" user_id=\"185343:

Hi,

Just a random question...how are these so-called greenhouse gases cause global warming? Is there a chemical reaction taking place?

Earth’s atmosphere works something like a giant glass greenhouse. As the sun’s rays enter our atmosphere, most continue right down to the planet’s surface. As they hit the soil and surface waters, those rays release much of their energy as heat. Some of the heat then radiates back out into space. However, certain gases in our atmosphere, such as carbon dioxide, methane and water vapor, work like a blanket to retain much of that heat. This helps to warm our atmosphere. The gases do this by absorbing the heat and radiating it back to Earth’s surface. These gases are nicknamed “greenhouse gases” because of their heat-trapping effect. The increase in the levels of these greenhouse gases due to our contributions such as burning of fossil fuels and deforesting gives rise to its effect to global warming.

So, yes there is still Chemistry in it's process.

great job and a perfect question! to add, here are the chemical reaction of the biological processes which gives off greenhouse gases,

combustion of fossil fuel: 6 O2 + C6H12O6 --------> 6 H2O + 6 CO2 + energy

methanogenesis, or the methane production - usually occurs in fresh water wetlands:
CH3COOH --------> CO2 + CH4.

NATURALLY OCCURRING or those made by humans,

chlorofluorocarbons - (anthropogenic) created by humans, since no natural known source of greenhouse gas which contains chlorine, fluorine and carbon

nitrous oxide (N2O) - by product of nitrification and denitrification or are biotically transformed by microbes; possible source is fertilizer on agricultural fields.

troposhepric ozone (O3) - a constituent of smog; can be produces from other greenhouse gases by,
- CH4 + 4O2 --------> HCHO + H2O + 2O3
- NO2 + O2 <--------> NO + O3


Thanks lee, chaocheng and change146!

wooyin08\" post_id=\"1979009\" time=\"1591017023\" user_id=\"185522:

Hello, I'm in SEC btw. Thanks!

Hi wooyin,

please check your inbox.

Thanks,
UPTAS

Hey there parents!


Are your kids now revising? If they have landed on the topic of the periodic table, maybe this Q&A could help.

Which of the following statements is incorrect for an element with six valence electrons in its atoms?
A.\tThe element must be a gaseous non- metal.
B.\tThe element must be placed in Group VI of the Periodic Table.
C.\tIts atoms can gain two electrons during a chemical reaction.
D.\tIts atoms cannot form an ionic bond with atoms of another element in the same group. \t\t\t\t\t\t\t\t\t

Answer: A

Explanation: An element with six valence electrons need not be a gas. If the AT of the element is large, there will be significant intermolecular forces which hold the atoms together, requiring a large amount of energy to separate the atoms.

Jaiyous!

chay58\" post_id=\"1978344\" time=\"1590722909\" user_id=\"185479:

Hi there!

I don't know if I landed the appropriate forum but may I ask if you have assessment books? or do you have an idea where I could find a most recent assessment books?

Thanks!

Hi chay58,

I'll be sending you PM for details on this.

Regards,
UPTAS

i see. I thought knitting also has some very complicated stitches like in crocheting.

do you do both?

Miracle Learner\" post_id=\"1976753\" time=\"1589881717\" user_id=\"61509:[quote=\"Miracle Learner\" post_id=1976753 time=1589881717 user_id=61509]
Learning at home

I read newspapers during breakfast.

I visit a few finance and news websites and forums for information.

I take a few online courses.

I attend a few webinars.

I watch youtube videos.

I try to read widely outside my area of expertise and interest so I can get a broader perspective and discover new stuff.

I want to be open minded.

You don't know what you don't know.

Sometimes all you need is one good idea to change your life. Provided you act on the idea.

Nowadays everything is online because of the covid19.

You actually save time on travelling.

howiwanttochangetheworld.blogspot.com[/quote]

I used to do this early on. but now I kind of gotten lazy with spending much time facing the computer. haha!
needing some more motivation or, I don't know how to get it going. I haven't finished the online course I signed up to a month ago.

Here’s another periodic table interpretation trick in "guessing" the state of the element in the environment.


Which of the following would be a solid at room temperature?
A. Xenon\t\t\t\t\tB. Radon
C. Astatine\t\t\t\t\tD. Bromine \t \t\t

Answer: C

Explanation: Astatine is below iodine in the Group VII. Iodine is a solid and, by deduction, astatine would also be a solid. All the other options are elements in gaseous state.

hey there students and parents!



I know some of you have started revising. I hope this forum have helped you with it.
For today, let’s review some periodic table arrangement patterns.

Which of the following properties is used to arrange elements in the Periodic Table?
A. Reactivity\t\t\t \tB. Mass number
C. Atomic number\t\t\tD. Neutron number\t \t

Answer: C

Explanation: The elements are arranged according to the number of protons in the nucleus, i.e., the atomic number.