Physics paper 31 , (a death call)

[waleed82]

That's what i got 7.777777778=7.78m/s

Mine was too like dat.......i just used da formula s=d/t n then use da values of the point c.......from where the decleration started! Ryt! Wat abot u guyz!

 

[waleed82]

what abt the LDR position? anybody who had time to use their brains in the last Q? :/

No guyz it was on b ! well wat made u consider itz place as A!

 

[waleed82]

hi! it ws fyn, alhamdulillah!
da one which moved a small dist is b'coz da area ws big. da other one coz da area ws small

Well actuallt this question was based on formula of pressure......n it too simple.......luk......if da area ix bigger so there ix less pressure but more force to move it n itz like dat force ix inversly proportional to pressure! Meanz that if larger area so, less pressure but more force needed but if smaller area so less force but larger pressure.....! Ryt!

 

[waleed82]

so guyz now just leve thix shit just prepare for the comin up paper 61 of physics............well m amazed da physics paper11 was easy but paper 31 was............ugh.............well now just do ya best for paper 61 (ATP)

 

[ThatReallyReallyWeirdDude]

Arent u people getting too sentimental over yuor answers? LOL! Forget it guys..Guess what I screwed up p3 and p1 but i am still not upset cox I know the GT is gonna be low Learn to learn from your mistakes

Lol i'm not tooo worried. I mean I know I did good.
I'm sorry bout your papers though

conduction is only fast in metals, it was glass. ur answers prove that u know nothing about physics u just memorize

Are you so desperate to make yourself believe that you didn't lose those 5 marks that you will start insulting me?
You're right about glass being a bad conductor of heat but that actually makes my answer correct.
Since glass is a bad conductor of heat it takes time for the heat to get to the liquid
This is quoted from a website:
"

​

A flask made of thick glass is filled with a coloured liquid Acork is fitted through which a narrow glass tube is inserted. There is a scale marked onthe tube. Some liquid will rise up inside the tube up to a point which is marked by O onthe scale. Now the flask is placed inside a big vessel of boiling water which heats up theflask and as well as the liquid inside. It is observed that the liquid inside the tube firstcomes down to a position marked by A and later it rises again, goes past O and reaches ata point marked by B. The reason is that there is an expansion of the glass container at the beginning. As the glass is a bad conductor of heat, it takes some time for heat to reach theliquid inside the flask and because of this there is no expansion of liquid at the initialstage. Thus the liquid surface comes down from O to A inside the tube. After a while theheat starts flowing into the liquid for which the liquid expands and it begins to rise insidethe tube. The expansion of liquid is more than the expansion of glass. Thus we see thefinal rise of liquid is at B above the point O"​

Enough said. ​

Edit: Font colour of website was black, changed it.

 

[gooner]

guyz what was the max speed? :\
was it 7. something???
please discuss the paper !!

i got 9.33 m/s

 

[gooner]

I wrote that too!


Did u take the distance as the steep line's height or something?
Coz for the speed we had to directly choose values from the graph of the distance and time..

no the LDR should be in B!

 

[gooner]

the direction of the current was to the right?

yeah

 

[aliiiiiiiiii]

I wrote that too!


Did u take the distance as the steep line's height or something?
Coz for the speed we had to directly choose values from the graph of the distance and time..

i choose from the graph there was the higest 10m/s

 

[IGCSE O/L student]

wat u wrote for the voltage between x and Y?

dat ws 2.4V, i guess

 

[svenas]

dat ws 2.4V, i guess

plz can u check my answer in this question: q5 biv http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w10_qp_31.pdf.....

 

[YMCMB]

At first i got 1.8 ohms as the resistance but then that is the total resistance of the circuit what i did was get the total resistance and the resistance of the parellel resistors then subtract both and i got a 1.1 ohms .

thats the pefect answer for sure!

 

[IGCSE O/L student]

Well actuallt this question was based on formula of pressure......n it too simple.......luk......if da area ix bigger so there ix less pressure but more force to move it n itz like dat force ix inversly proportional to pressure! Meanz that if larger area so, less pressure but more force needed but if smaller area so less force but larger pressure.....! Ryt!

yes, dats da xplanation, but i ws too lazy 2 typ all dat

 

[gooner]

i choose from the graph there was the higest 10m/s

yupp!

 

[Roselian]

I also got 1.8 for the resistance first, then after finding some big mistake I fixed it and got 1.1. Icant remember exactly how I did it but others in my exam said they got the same, 1.1.

 

[IGCSE O/L student]

plz can u check my answer in this question: q5 biv http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w10_qp_31.pdf.....

yes, dats ryt. u've got it.

 

[svenas]

thats the pefect answer for sure!

I thnk the ans is 1.8 ohms since voltage across R resistor is 3.6 v and total current is 2A then the resistance will be 3.6/2=1.8 ohms

 

[svenas]

yes, dats ryt. u've got it.

thank u!!

 

[IGCSE O/L student]

I thnk the ans is 1.8 ohms since voltage across R resistor is 3.6 v and total current is 2A then the resistance will be 3.6/2=1.8 ohms

yes, dats ryt.
plus, it ws 4 2 marks, so no mch thinkin ws needed.

 

[IGCSE O/L student]

thank u!!

dnt mention it.
jst pray 4 me.