Qualification > Sciences
who have answers to this book???(edexcel)
Deadly_king:
--- Quote from: Relina on December 03, 2010, 05:05:23 pm ---my second question is is this Q1:definition write or should it include 1/12th the mass of carbon-12 atom
Q2: i have attatched the table and the question
if u know what are the studies that would be needed to determine if food labelling has an impact on dietary choices?? ??? ???
--- End quote ---
1. The definition is sometimes said to be enough but I'll advice you to always include the 1/12th. This will make your answer more precise and you can be sure not to lose marks in case they take it as a key point. ;)
2. (a) According to the table, the very high mass of CO in air is about 20 or more ppm within an average of 8 hours.
Since you're asked minimum, you should take 20. And since you need for 24 hours, juts multiply by 3. ;)
Hence answer is (20 x 3) = 60 ppm
(b) As you can note from the table, each pollutant has its own lapse of time or is measured in either ppm or ppb. This pose a problem when you're going to compare the data.
Therefore you should convert all of them to the same lapse of time (Example : 24hr) and same unit.(Example : ppb)
Now to your question.
According to me food labelling indeed has an impact on dietary choices. But how can we determine that?
First you should have a certain number of persons who are on diet. Then you note all the substances that they buy after having consulted a doctor and considering his advice with utmost importance.
After that you list all the ingredients of these substances and compare what are present in high numbers and what is absent. ;)
NOTE : The last answer is just my opinion about it. There may be various ways of proceeding. ;D
~ Miss Relina ~:
--- Quote from: Martin Luther King Jr on December 06, 2010, 10:57:49 am ---1. The definition is sometimes said to be enough but I'll advice you to always include the 1/12th. This will make your answer more precise and you can be sure not to lose marks in case they take it as a key point. ;)
2. (a) According to the table, the very high mass of CO in air is about 20 or more ppm within an average of 8 hours.
Since you're asked minimum, you should take 20. And since you need for 24 hours, juts multiply by 3. ;)
Hence answer is (20 x 3) = 60 ppm
(b) As you can note from the table, each pollutant has its own lapse of time or is measured in either ppm or ppb. This pose a problem when you're going to compare the data.
Therefore you should convert all of them to the same lapse of time (Example : 24hr) and same unit.(Example : ppb)
Now to your question.
According to me food labelling indeed has an impact on dietary choices. But how can we determine that?
First you should have a certain number of persons who are on diet. Then you note all the substances that they buy after having consulted a doctor and considering his advice with utmost importance.
After that you list all the ingredients of these substances and compare what are present in high numbers and what is absent. ;)
NOTE : The last answer is just my opinion about it. There may be various ways of proceeding. ;D
--- End quote ---
Thanks very much I really appreciate ur help pal Thanks and I'll be waitng always for ur replies to me ;)
~ Miss Relina ~:
--- Quote from: Captain Jack Sparrow on December 03, 2010, 05:09:11 pm ---first Q , my teacher said that it has to be compared to 1/12 of a carbon12 atom .
Second Q , sorry can't help u I'm doing something else :-X
--- End quote ---
ohno robs Thanks anyway :D
Deadly_king:
--- Quote from: Relina on December 07, 2010, 11:57:07 am ---
Thanks very much I really appreciate ur help pal Thanks and I'll be waitng always for ur replies to me ;)
--- End quote ---
You're welcome dear. :D
I'll be glad to help you as much as I can. ;)
The Golden Girl =D:
--- Quote from: Relina on December 07, 2010, 11:58:08 am ---ohno robs Thanks anyway :D
--- End quote ---
Hmm np =]
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