physics paper 33

[Almostdoctor]

Copy paste

Obv

 

[Almostdoctor]

Someone pls help me with question 1 part f
http://www.xtremepapers.com/community/attachments/9702_w11_qp_35-pdf.9549/

Can someone pleeeeeaaaase help me :'(

 

[Usman Ismail]

(i) Limitations 4 max.


thankx mate




Two readings are not enough (to draw a conclusion)
Heat loss (to surroundings or beaker)

Small value of (θ2 – θ1)/
% uncertainty in (θ2 – θ1) is large

Low precision of thermometer
Resistor/bulb of thermometer is not completely immersed

Water is left behind in measuring cylinder

Resistor continues to give out heat when switched off/ temperature continues to rise after switching off

(ii) Improvements 4 max.

Take more readings and plot a graph/calculate more k values (and compare)
Method to reduce heat loss, e.g. lagging, lid

Method to increase (θ2 – θ1) e.g. higher voltage, lower resistance, increased time, less water

Either: thermometer with specified better precision, e.g. 0.1 oC, 0.5 oC
Or: named device such as thermocouple or resistance thermometer.

Use narrower beaker

Method to measure mass of water, e.g. subtract mass of empty beaker from mass of beaker with water

Wait until temperature reaches a maximum before reading

 

[Almostdoctor]

It is suggested that the quantities m and d are related by the equation m/d = – A/d + B
where A and B are constants.
Use your answers in (a) and (e)(iii) to determine the least value of m that would be needed to completely submerge the beaker.
How to do this?

 

[Dani boi]

Can someone pleeeeeaaaase help me :'(

hey !
put ur gradient=-A/d.....and find value of A
put ur y-intercept=B......and find value of B
use this values to calculate m.....

 

[Almostdoctor]

hey !
put ur gradient=-A/d.....and find value of A
put ur y-intercept=B......and find value of B
use this values to calculate m.....

OMG thank you sooooo muchhhh thank you

 

[mujtabashahnawaz]

Rearrange equation so that m/d equals y intercept and 1/d equals gradient. then calculate d from 1/d=m (using gradient). use the value of d obatined and put in in m/d=y intercept and solve to get value of ''m''! Hope that helps!

 

[Dani boi]

OMG thank you sooooo muchhhh thank you

no problem dude!!

 

[Almostdoctor]

Rearrange equation so that m/d equals y intercept and 1/d equals gradient. then calculate d from 1/d=m (using gradient). use the value of d obatined and put in in m/d=y intercept and solve to get value of ''m''! Hope that helps!

Thank youuuu (Y)

 

[code11]

It is suggested that the quantities m and d are related by the equation m/d = – A/d + B
where A and B are constants.
Use your answers in (a) and (e)(iii) to determine the least value of m that would be needed to completely submerge the beaker.
How to do this?

dude wich question is dis ?

 

[mujtabashahnawaz]

Thank youuuu (Y)

No prob

 

[Almostdoctor]

dude wich question is dis ?

The equation thing after the graph
.http://www.xtremepapers.com/community/attachments/9702_w11_qp_35-pdf.9549/ q1f

 

[YeahMeAgain]

anyone else doing paper 31? will there be electricity in paper 31?

 

[Almostdoctor]

Arright people good night and good luck for tomorrow. Pray for me please.
May we all do great...and the thresholds are really low (Y)

 

[code11]

Rearrange equation so that m/d equals y intercept and 1/d equals gradient. then calculate d from 1/d=m (using gradient). use the value of d obatined and put in in m/d=y intercept and solve to get value of ''m''! Hope that helps!

arent we suppose to substitute d with value of h obtained in a) ?

 

[mujtabashahnawaz]

arent we suppose to substitute d with value of h obtained in a) ?

I don't think so

 

[Uzair ALI 9]

post your doubts and info related to paper 33

somebody on the other thread said that we will have 1st question on force etc and the 2nd one on heating? dude help me plz i have NO idea what kinda heating questions they may give us in PHYSICS??? ive never seen any heating questions in the physics practical... =S im really confused! those who have info on this, plz help me out man ill be really thankfull! give me some details on the heating question that we may have as Question no.2

the first Question will be of finding the angle of a suspended rod by springs and weights and 2nd question on heating.. (hot or cold water will be given and measuring temperature by theermometer)............

 

[mujtabashahnawaz]

Can anyone help me with Q1 (f) http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_s11_qp_34.pdf

 

[ranahamzaintisar]

can anyone tell which type of spring constant Qs are included??

 

[Potter Head]

to determine wether two quantities are directy proprtional we subtract smaller value of k from d bigger one den divide by bigger value..if the percentage is greater than 10 percent dn nt proportional otherwise proportional..is this method correct or not??