Physics, Chemistry and Biology: Post your doubts here!

[ZaqZainab]

there is an error in the page

i usually get MS from there but i guess it is not working for me either sorry

 

[ZaqZainab]

it's ok by da way thanks 4 ur help

You are welcome just do remember me in your prayers you are studying a lot i see as yo are doing of the time you were not even born Best Of Luck for the exam

 

[salma_69]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w10_qp_32.pdf guys question 1 d and e tell me how to do it please.

d is F because in this question water is considered to be impure and therefore impurities lower melting point and increases boiling point
e is C because of high m.p and b.p and electrical conductivity in liduid or aqueous only
IT'S TRICKYYY

 

[mohammed sayed]

could u all help me by gussing a possible curve for math, physics , chemistry and espicially biology!!!! plzz reply fast!!!!

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_w08_qp_01.pdf NEED HELP FR QUESTION NO 21..PLZ

 

[zakaria khaled]

hi .... i want to know a pridiction for the physics june 2013 curve cambridge

 

[zakaria khaled]

i want to know a prediction for the curve of june 2013 physics olv

 

[zakaria khaled]

??????????????

 

[shazmina]

da answer is B because lactic acid concentration started from zero and increased rapidly till da tym 4 mins nd then decreased rapidly again (which means tht da athlete was no longer running)
lactic acid is only made in da muscles wen v r doin sumthin vigorous like exercise or running etc v need more oxygen for energy nd wen no more oxygen is there lactic acid starts to build up in our mucles..
so da athlete started from 0 nd ran till 4 mins so we minus da values (4 - 0) which is 4 only..
i hope ur doubt is cleared

tnxs a billion, as it ws rele vry helpful...

 

[inquisitiveness]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_w12_qp_12.pdf
q.8 D:

 

[silentkiller97]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_w12_qp_12.pdf
q.8 D:

it is D as all other choices are losing/gaining water by evaporation. then osmosis in a leaf takes place within walls of the connected cells

 

[KARIM1]

biology paper 1 m/j 2010 (13) question 33 ?

 

[inquisitiveness]

wh

it is D as all other choices are losing/gaining water by evaporation. then osmosis in a leaf takes place within walls of the connected cells

why not A though
thank you btw!!

 

[inquisitiveness]

What is the main function of muscle?
A absorption
B conduction
C contraction
D transport
whats conduction in B,?i knnow the right answer but just wondering what conduction is

 

[cookies&cream]

biology paper 1 m/j 2010 (13) question 33 ?

Answer is B.
Peter has a heterozygous genotype (you'll know by looking at the 1st generation) and Hannah's is homozygous. By crossing both genotypes (you should know how to do that), you get a ratio of 2:2 which simplifies to 1:1. So that's two equal parts, which means the chance is 1 out of 2.

 

[KARIM1]

Answer is B.
Peter has a heterozygous genotype (you'll know by looking at the 1st generation) and Hannah's is homozygous. By crossing both genotypes (you should know how to do that), you get a ratio of 2:2 which simplifies to 1:1. So that's two equal parts, which means the chance is 1 out of 2.

undoubtedly, i know how to cross but i have choosed 1:1 as last ratio was 1:1 but i dont get your last part!

 

[KARIM1]

What is the main function of muscle?
A absorption
B conduction
C contraction
D transport
whats conduction in B,?i knnow the right answer but just wondering what conduction is

conduction is the ability to allow heat or electricity(electrical energy) to pass through it

 

[cookies&cream]

undoubtedly, i know how to cross but i have choosed 1:1 as last ratio was 1:1 but i dont get your last part!

Hm..
According to the ratio, chances of being a taster equal chances of being a non-taster, right? So the chance that the child will be a non-taster is 1/2 or 1 in 2.
Does that make sense?

 

[inquisitiveness]

conduction is the ability to allow heat or electricity(electrical energy) to pass through it

but the syllabus says you should know that xylems funtion is to conduct.......i think there is a diff conduction term in biology

 

[Iridescent]

Does anyone have marking schemes for biology P1 for the years 2000, 2001 and 2002?
ZaqZainab do you have them?