AS Level help for students

[Ameeratul Layl]

lol sis^^i thought he was a sis 2..sowie lol

maaan all of you'z are well clever here...alll taking sceince or relating to science good on u all...i think am 2 dumb 4this thread i'll shuhhhHH..

First of all, I am glad you find this thread useful.
Secondly, no one is dumb. We were not born with the knowledge, everyone has to GAIN knowledge. With some people, they gain more knowledge than others at a certain age. Some people are slow at learning and I am a typical example. No one is dumb for any thread. We are all here in this Dunya and part of this thread, to learn.
Don't think ill of yourself sister.

 

[Ameeratul Layl]

salam,

Just out of interest, what is the pass % for 1 exam paper (AS Biology)?
What % for 1 exam paper is an E?

wasalam

 

[...]

sos dunno...

 

[ameen]

salam,

Just out of interest, what is the pass % for 1 exam paper (AS Biology)?
What % for 1 exam paper is an E?

wasalam

salam,

below are the grade-boundaries used for the Edexcel Biology Units taken in January of this Year (2006). The grade-boundaries do vary from time to time - but only slightly if they do.

According to this, a grade E would require roughly around 40% of the marks.

wsalam

 

[Ameeratul Layl]

salam,

below are the grade-boundaries used for the Edexcel Biology Units taken in January of this Year (2006). The grade-boundaries do vary from time to time - but only slightly if they do.

According to this, a grade E would require roughly around 40% of the marks.

wsalam

I'm doing AQA for Biology, not EDEXCEL.
Just wish to know the % for atleast a garde E.

 

[ameen]

I'm doing AQA for Biology, not EDEXCEL.
Just wish to know the % for atleast a garde E.

salam,

The grade-boundaries used by AQA should be very similar to those used by Edexcel (ie. around 40% for grade E). The above list is from the back of a mark-scheme I have for Edexcel - but not AQA.

There may be something on AQA's website though (www.aqa.org.uk).


wsalam

 

[ameen]

salam,

I found the AQA grade-boundaries on page 3 of this PDF file on their website:

http://www.aqa.org.uk/news/GRADE_BOUNDARIES.PDF

For grade E , their requirement is also around 40% for the Biology Units.

wsalam
 

 

[Ameeratul Layl]

[BANANA]salam.JazakAllah br ameen.[/BANANA]


[MOUSE]Physics issue[/MOUSE]

This question is set as a revision question for homework. I have read it carefully and managed to pick out what I believe to be the important parts.

The question is about:
-a shower system
-the syetm can be operated with one/two 4kW heaters connected.

Q) explain why the water achieves a contant temp when the shower is operating.


A) Because, the mains will switch on which means the heater chamber will heat the water. If the coils become too hot then the heater chamber will switch off and water will cool down.

Is my answer right?

wasalam and jazakAllah.

ALSO: What is the formula for flow rate? It is to do with specific heat capacity - E=MCT

 

[ameen]

(deleted)

 

[ameen]

salam,

The following are the syllabus-specific AS books that I would recommend for the courses given in bold:


Psychology - AQA

http://www.amazon.co.uk/Psychology-...qid=1159187445/ref=sr_1_2/026-9409698-5694053


Mathematics - Edexcel

Core Maths - C1
http://www.amazon.co.uk/Mathematics...qid=1159187739/ref=sr_1_1/026-9409698-5694053

Core Maths - C2
http://www.amazon.co.uk/Mathematics...10983/ref=pd_bxgy_b_img_b/026-9409698-5694053

Statistics - S1
http://www.amazon.co.uk/Statistics-...qid=1159187778/ref=sr_1_5/026-9409698-5694053


Biology - Edexcel

Unit 1 - Molecules and Cells
http://www.amazon.co.uk/Edexcel-Bio...qid=1159187292/ref=sr_1_3/026-9409698-5694053

Unit 2 - Exchange, Transport and Reproduction
http://www.amazon.co.uk/Edexcel-Bio...qid=1159187865/ref=sr_1_2/026-9409698-5694053

Unit 3 - Energy and the Environment
http://www.amazon.co.uk/Energy-Envi...qid=1159187389/ref=sr_1_6/026-9409698-5694053


Chemistry - Edexcel Nuffield

The Students' Book
http://www.amazon.co.uk/Nuffield-Ad...qid=1159187948/ref=sr_1_3/026-9409698-5694053

The Teachers' Guide (Useful because has answers to questions in the Student's Book)
http://www.amazon.co.uk/Nuffield-Ad...qid=1159187948/ref=sr_1_6/026-9409698-5694053


wsalam

 

[Ameeratul Layl]

Could someone kindly post seperate graphs to represent the following:

1)Electrical conductivity from H -Ar
2)Melting and boiling points from H-Ar
3)First ionisation enthalpy from H-Ar.

JazakAllah

 

[Ameeratul Layl]

Could someone kindly post seperate graphs to represent the following:

1)Electrical conductivity from H -Ar
2)Melting and boiling points from H-Ar
3)First ionisation enthalpy from H-Ar.

JazakAllah

salam,

Anyone??

wasalam

 

[Ameeratul Layl]

Could someone kindly post seperate graphs to represent the following:

1)Electrical conductivity from H -Ar
2)Melting and boiling points from H-Ar
3)First ionisation enthalpy from H-Ar.

JazakAllah

Please help...someone.

 

[ameen]

Could someone kindly post seperate graphs to represent the following:

1)Electrical conductivity from H -Ar

salam,


1) Electrical Conductivity of the Elements:

source: http://www.boolean.ca/perlib/


wsalam
 

 

[ameen]

Could someone kindly post seperate graphs to represent the following:

2)Melting and boiling points from H-Ar

2) Melting Points of the Elements:

source: http://www.webelements.com/webelements/scholar/properties/image-bars/melting-point.html



2) Boiling Points of the Elements:

source: http://www.webelements.com/webelements/scholar/properties/image-bars/boiling-point.html


wsalam
 

 

[ameen]

Could someone kindly post seperate graphs to represent the following:

3)First ionisation enthalpy from H-Ar.

3) First Ionization Energies / Enthalpies of the Elements:

source: http://www.webelements.com/webelements/properties/text/image-bars/ionization-energy-1.html


wsalam
 

 

[Ameeratul Layl]

salam,

Oh brother, WAllah, I cannot elaborate how...thankful I am.
Name the nmber of reps!

wasalam
p.s:JazakAllah!!

 

[AceOfHearts]

[BANANA]salam.JazakAllah br ameen.[/BANANA]


[MOUSE]Physics issue[/MOUSE]

This question is set as a revision question for homework. I have read it carefully and managed to pick out what I believe to be the important parts.

The question is about:
-a shower system
-the syetm can be operated with one/two 4kW heaters connected.

Q) explain why the water achieves a contant temp when the shower is operating.


A) Because, the mains will switch on which means the heater chamber will heat the water. If the coils become too hot then the heater chamber will switch off and water will cool down.

Is my answer right?

wasalam and jazakAllah.

ALSO: What is the formula for flow rate? It is to do with specific heat capacity - E=MCT

Assalamu alaikum Sister,

I cannot comment on whether your answer is right or wrong. I would say more information is required in the question for it to be the answer they are looking for, specifically about the the heating system and how it operates, which you did not give in the question. Or the context from which the question is taken from could mean your answer is the correct one.

Looking at the question on its own, I would simply say that the temperature of the water is constant because the 'flow rate' is constant when the shower is operating, and the power is constant (rate of energy transfer is constant). Therefore, as they are both constant, the temperature of the water stays constant.

Hope that helps

 

[Ameeratul Layl]

Assalamu alaikum Sister,

I cannot comment on whether your answer is right or wrong. I would say more information is required in the question for it to be the answer they are looking for, specifically about the the heating system and how it operates, which you did not give in the question. Or the context from which the question is taken from could mean your answer is the correct one.

Looking at the question on its own, I would simply say that the temperature of the water is constant because the 'flow rate' is constant when the shower is operating, and the power is constant (rate of energy transfer is constant). Therefore, as they are both constant, the temperature of the water stays constant.

Hope that helps

I handed that assigment question in ages ago. But jazakAllah for reading my post and posting.

wasalam