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science and maths revision help.
I have already found something i'm stuck on and will keep this thread open incase i'm stuck with anything else, so please no spamming, get straight to the point.
1) what TWO thing does the dynamic equilibrium sign mean? the reaction is reversible? but what else? after a certain time the same amount of products and reactants are being made?
1) what TWO thing does the dynamic equilibrium sign mean? the reaction is reversible? but what else? after a certain time the same amount of products and reactants are being made?
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Plus you know how we get seasons because the earth is tilted. Does the earth vary the amount it tilts by, or is it because we go up and down through our orbit. and if its the first reason, if the earth is travelling so fast, why don't we notice the jerk of it stopping on the longest day, to start titling the other way?
You can't always rely on wikipedia but in this case the entry seems okay.
http://en.wikipedia.o...i/Dynamic_equilibrium
I think a good point is that substances move between the chemicals at an equal rate, meaning there is no net change
If you want help with Maths let me know as that's my subject.
http://en.wikipedia.o...i/Dynamic_equilibrium
I think a good point is that substances move between the chemicals at an equal rate, meaning there is no net change
If you want help with Maths let me know as that's my subject.
Plus when you're doing an a* rearranging formula, is there a particular order you should do things in?
We had something silly like this (which may actually be easier than the one we had; make y the formula; and hopefull it will come out in the right format (ignore the commas)
x = y( 2 + y) + z ( y + 4)
,,,,,-------------------------
,,,,,z (2x +2y) - 3y
We had something silly like this (which may actually be easier than the one we had; make y the formula; and hopefull it will come out in the right format (ignore the commas)
x = y( 2 + y) + z ( y + 4)
,,,,,-------------------------
,,,,,z (2x +2y) - 3y
-- answer removed --
Multiply both sides by the denominator which in this case is z (2x +2y) - 3y
Expand all your brackets.
Collect like terms and rearrange so that all the y terms are on one side.
Then factorise- i.e. take y outsidethe bracket.
Divide both sides by whatever is in the bracket.
That will give you an expression for y
Give me a real example to do if you want.
.
Expand all your brackets.
Collect like terms and rearrange so that all the y terms are on one side.
Then factorise- i.e. take y outsidethe bracket.
Divide both sides by whatever is in the bracket.
That will give you an expression for y
Give me a real example to do if you want.
.
The bottom sets in my school just do one gcse in science over 2 years. Everyone in and above set three does a gcse in 'science' in eyar 10 and another in year 11. But fi you're in set 2 or 1 you can do those two gcse's but pick, instead of a fourth subject like french or art etc, to do triple science, where you do extra coursework and units and are examed in the in year 11. By doing this little bit extra, instead of getting 2 'science' gcses you get three, one in each science.
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