Biology; Chemistry; Physics: Post your doubts here!

[Joseph Potts]

Out of these three opitions:
i) Cambridge O Level Physics 2012 by David Sang (Complete Cambridge))
ii) GCE 'O' Level Physics Matters
ii) Fundamental of physics for O level by Stephen Pople
Which one should I choose to read from. Which is the most descriptive book that covers the whole syllabus of 2013(or 2014) in a lucid and easy language.

 

[falcon678]

thanks man.

no prob...!

 

[falcon678]

Out of these three opitions:
i) Cambridge O Level Physics 2012 by David Sang (Complete Cambridge))
ii) GCE 'O' Level Physics Matters
ii) Fundamental of physics for O level by Stephen Pople
Which one should I choose to read from. Which is the most descriptive book that covers the whole syllabus of 2013(or 2014) in a lucid and easy language.

dude make ur mind...easy language....or descriptive....!
these both dun go toghthr...!

 

[Joseph Potts]

dude make ur mind...easy language....or descriptive....!
these both dun go toghthr...!

Alright, I choose descriptive

 

[falcon678]

Alright, I choose descriptive

now u talking
my choice...Stephen Pople....!

 

[Joseph Potts]

now u talking
my choice...Stephen Pople....!

Really? What about Physics Matters? Is it more detailed than that? It's certainly a bigger book ;P.

 

[falcon678]

Really? What about Physics Matters? Is it more detailed than that? It's certainly a bigger book ;P.

first n formost....tht book hasnt got the complete syllabus coverage....it misses out deformation of solids(hook's law) n also radioactivity.... plus itz language is fairly easy....! not very descriptive thou...!

 

[hussey96]

here you will find great notes of Islamiat urdu and Pak-studies just have a look
http://notes4-olevel.blogspot.com

 

[scouserlfc]

Hi, can you pls help me out with IG 0610 Biology nov 2003 paper 3 Q3(b),(c) and (d)...
Pls help as soon as possible cos my exams are not very far... ​

sry cudnt help u out,really dont get time to log into XPC everyday

 

[falcon678]

here you will find great notes of Islamiat urdu and Pak-studies just have a look
http://notes4-olevel.blogspot.com

dude wrong thread..!!

 

[Nerdz]

Biology question: (Paper 2 May/June 2003 Question 6)
Explain how energy is trapped by a plant, stored and then released several days later (7 marks)

Describe the path taken by a molecule of oxygen as it passes from air in the lungs to a muscle cell in the body. (6 marks)

Sometimes babies are born with a hole between the left and right sides of the heart, through which blood can pass. Explain the effect this has on the double circulation (4 marks)
Thanks

 

[Jilva_02]

Re: Biology,Chemistry & Physics Help Available Here !

Need help. What is the chemical formula of potassium sulfate? is it K2SO4 or KSO2?

K2SO4

 

[falcon678]

Biology question: (Paper 2 May/June 2003 Question 6)
Explain how energy is trapped by a plant, stored and then released several days later (7 marks)

Describe the path taken by a molecule of oxygen as it passes from air in the lungs to a muscle cell in the body. (6 marks)

Sometimes babies are born with a hole between the left and right sides of the heart, through which blood can pass. Explain the effect this has on the double circulation (4 marks)
Thanks

Question 1..... the energy is trappd by the plants whn they absorb sunlight throu chlorophyll......thn tht enegry is used to make gluscose....tht glucose is tht convrtd to starch n stord.....whn plants dun ve enough food...or tht plant is eatn by animals the starch is convrtd to glucose n used in respiration several days latr releasing the energy stord tht waz initaly absorbd by plants as sunlight...!

Question 2..... the oxygen molecule entrs the body eithr throu nasal cavity (nose) or buccal cavity (mouth) n entrs the lung throu trachea .....in lungs oxygn molecule gets into alveoli n dissolves in the watr layer in alveoli n thn diffuses acros membrane into blood attachin itself to haemoglobin forming oxyhaemoglobin.....thn aftr reaching requird destination in deattaches itself frm oxyhaemoglobin n diffuses into muscle...!

Question 3....the hole b/t right side n left side causes mixing of oxygenatd n deoxygnatd blood...the oxygentad blood..wich is supposed to go to body may get again to lungs...while the deoxygnetad blood wich is supposed to go to lungs may go to body...!

 

[Joseph Potts]

For chemistry, should I consider reading "A New Certificate Chemistry by holderness & Lambert" for O' levels or should I just stick with Chemistry Matters by Chen Ling Kwong?

 

[Nerdz]

Question 1..... the energy is trappd by the plants whn they absorb sunlight throu chlorophyll......thn tht enegry is used to make gluscose....tht glucose is tht convrtd to starch n stord.....whn plants dun ve enough food...or tht plant is eatn by animals the starch is convrtd to glucose n used in respiration several days latr releasing the energy stord tht waz initaly absorbd by plants as sunlight...!

Question 2..... the oxygen molecule entrs the body eithr throu nasal cavity (nose) or buccal cavity (mouth) n entrs the lung throu trachea .....in lungs oxygn molecule gets into alveoli n dissolves in the watr layer in alveoli n thn diffuses acros membrane into blood attachin itself to haemoglobin forming oxyhaemoglobin.....thn aftr reaching requird destination in deattaches itself frm oxyhaemoglobin n diffuses into muscle...!

Question 3....the hole b/t right side n left side causes mixing of oxygenatd n deoxygnatd blood...the oxygentad blood..wich is supposed to go to body may get again to lungs...while the deoxygnetad blood wich is supposed to go to lungs may go to body...!

Thankyou so much!!!!

 

[Nerdz]

Biology question
Describe how the following help to maintain a constant internal environment (total 10 marks)
a) The skin
b) the kidneys

Explain the harmful effects of cigarette smoke and where possible link each effect to a specific component (6 marks)

Describe the dangers of heroin abuse (4 marks)

Explain how variation within one species may eventually lead to the development of two seperate species. (4 marks)

Describe the role of bacteria in decomposition and yoghurt production (6 marks)

 

[Laibaaa]

Whats the easiest way to learn the numericals of Moles???

 

[applepie#]

Can anyone explain me the topic of CRO in physics 5040? Urgent!

 

[cambridgestudent]

Re: Biology,Chemistry & Physics Help Available Here !

Can some one explain to me what is the difference between these and the define them
1)Potential Difference
2)E.M.F
3)Current
4)Volts
If Currents and Volts are same then please Pardon me, Actually my teacher doesn't explain us anything and just gives us questions which are totally out of my mind. Worst in Physics

Assalamu Alaykum!
Well, I have the same doubts! : (

 

[Dandelion]

guys i need help please. bio past year m/j 2002 question 4.c
explain why the blood pressure in the left ventricles falls to zeroin the cardiac cycle, but the lowest blood pressure recorded in the arteries is about 10kpa.
answer :
i. (pressure falls to zero) because all blood expelled from ventricle
ii. (blood pressure falls to 1okPa) because elastic ffibres recoil.
iii. ref to smooth muscles qualified
iv. narrow diameter of capillaries/arterioles/small arteries
v, resistance to flow

i dont understand how they relate point ii-v to the low blood pressure in arteries. anyoneee can explain to meee ? thanks so much