Physics, Chemistry and Biology: Post your doubts here!

[Lightning soul]

one more question sorry
if they don't specify in the question whether the source is ac or dc then is this how you draw it??
---0 0---

np. You can assume dc but what you drew is correct as well

 

[GorgeousEyes]

https://www.xtremepapers.com/community/threads/physics-igcse-paper-6-final-revision-tips.25517/
That's insha'allah nearly all what's important to know about paper 6 .

 

[Lightning soul]

Guys I need your help in a Chemistry Paper 6 question
There was this question my friend gave me. It goes like this:
You have two metals- metal A and metal B. Hydrogen gas is given out when both metals react with Sulphuric acid. Plan an experiment to find out which metal is more reactive
The answer I wrote was: Take sulphuric acid in a beaker and add Metal A to it in excess. Filter out the excess Metal when effervescence stops. Add Metal B to the filtrate and check for a rise in temperature. If there is a rise, then Metal B is more reactive as it'll displace Metal A. If not, then Metal A is more reactive.
Is my answer correct? Will I get the full 6 marks?

Why does this question seem so familiar?

 

[ZaqZainab]

Why does this question seem so familiar?

It just came in the Exam

 

[Lightning soul]

It just came in the Exam

Precisely we can't discuss it yet

 

[Rohit06]

Why not?

 

[Lightning soul]

Some people still might not have done it. Read this --> https://www.xtremepapers.com/community/threads/ban-without-warning-paper-discussion.24957/

 

[Rohit06]

Oh okay....I deleted the post

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w07_qp_6.pdf Question 2 while plotting the points should i take 0 N????as we know 0N=100h0 and should i make a straight line?Curve?Just join the points?
and question 5 (c) ain't even getting the question

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s08_qp_6.pdf Question 1 b Silly ain't it? Lol I dunno well what i would write is know the length of the Cylinder and place it accordingly

 

[GorgeousEyes]

Please jun012 v.61 no.1 a

 

[GorgeousEyes]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s08_qp_6.pdf Question 1 b Silly ain't it? Lol I dunno well what i would write is know the length of the Cylinder and place it accordingly

Take reading at the edges of the cylinder r1 and r2 and get their average .. this shoud be 10 cm .

 

[GorgeousEyes]

Please jun012 v.61 no.1 a

ANYONE ?

 

[ZaqZainab]

ANYONE ?

Sorry have no idea But i still its just a guess that's the reason in the marking scheme they have given a wide rage

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s08_qp_6.pdf question 1 d (i) how TO MEASURE t and where is it?

 

[Lightning soul]

Should we extrapolate graphs for physics in alternative to practical?

Ok i found something else: graph lines should be neat, thin and a good fit (if there is scatter of points they should lie either side of the line{in a rough way!! }). Straight lines should FILL the page (even beyond the range of points) so that any gradient calculation can use the largest Dy and Dx. Students should understand why! (Dy is a measurement.)
Source: https://www.xtremepapers.com/community/threads/need-notes-on-paper-6-physics-igcse-asap.15850/

 

[Rohit06]

What is the average mark required to get an A* in Chemistry out of 180 (the total)? I know it is a silly question but any idea?

 

[Lightning soul]

What is the average mark required to get an A* in Chemistry out of 180 (the total)? I know it is a silly question but any idea?

I think thresholds are decided after all exams are marked

 

[GorgeousEyes]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s08_qp_6.pdf question 1 d (i) how TO MEASURE t and where is it?

T is the height

 

[GorgeousEyes]

Ok i found something else: graph lines should be neat, thin and a good fit (if there is scatter of points they should lie either side of the line{in a rough way!! }). Straight lines should FILL the page (even beyond the range of points) so that any gradient calculation can use the largest Dy and Dx. Students should understand why! (Dy is a measurement.)
Source: https://www.xtremepapers.com/community/threads/need-notes-on-paper-6-physics-igcse-asap.15850/

Please could u answer jun012 v.61 no.1 a.