Biology; Chemistry; Physics: Post your doubts here!

[Amnaa]

Me too

so.. no method to solve this question?

 

[Amnaa]

does mass of metal or the concentration of acid effect the rate of reation?

 

[farhan141]

Please Help

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s12_qp_22.pdf

Q.7
and
Q.9 Whole

 

[farhan141]

does mass of metal or the concentration of acid effect the rate of reation?

I think mass of metal doesn't affect but conc. of acid does affect the rate of reaction. Concentration of Acid, if more, then the rate of reaction increases. This is what I think, please correct me if I am wrong.

 

[farhan141]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w11_qp_21.pdf
Q9 (b)- v=
and

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w11_qp_22.pdf
Q9 (d) iii=

pls explain these

tag me please when u get the answers

 

[TheStallion-Reborn]

th

yup as the paper is folded three times, we are actually measuring the thickness of four papers. So, we divide 1.28/8, and that is 0.16

micrometer reads 1.28??

 

[asma tareen]

th
micrometer reads 1.28??

yes it does

 

[TheStallion-Reborn]

yes it does

it reads 28...

 

[asma tareen]

it reads 28...

no it doesnt

 

[TheStallion-Reborn]

no it doesnt

howww??!!

 

[asma tareen]

howww??!!

look firstly we look at the main scale and observe its 1 then we look at the rotating scale which gives the number which come after decimal which is 28

 

[usama321]

howww??!!

the primary scale reads 1 and the secondary scale reads 28. Don't remember the names of the scales

 

[asma tareen]

so the reading would bhi 1.28

 

[TheStallion-Reborn]

the primary scale reads 1 and the secondary scale reads 28. Don't remember the names of the scales

whts the primary scale.....??? n where to luk 4 it

 

[papajohn]

so the reading would bhi 1.28

Which question you people are talking about?

 

[TheStallion-Reborn]

Which question you people are talking about?

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w08_qp_4.pdf

 

[asma tareen]

Which question you people are talking about?

that ATP ONE

 

[usama321]

whts the primary scale.....??? n where to luk 4 it

http://www.cyberphysics.co.uk/practical/skills/micrometer.htm

 

[papajohn]

Why we divide the reading by 8 rather than 6??

 

[asma tareen]

its wx folded three times and one wx the side original side like the one other than the folded ones

Why we divide the reading by 8 rather than 6??