physics paper 33

[7devilsallaround]

i mean js suppose thy hv said u to dtrmine spring constant wd th help of gradient thn u shuld hv to chng it..

Alrighty tyvm

 

[broken angel]

Ohkayy...by "at the end" you mean when we write the answer in the ___ at the end of each part like ii) or iv) ? And what about in tables, use SI for those too?

in tables use the one which has been used for previus gaps

 

[7devilsallaround]

in tables use the one which has been used for previus gaps

Kay. And can you plz explain what this means? "When repeated readings have been done then it is
expected that the uncertainty in the measured quantity will be half the range"

 

[broken angel]

yes when repeat ou readings js like in time its actualy we r reducing error so whn we take 2 reading for each set n then take average it means uncertanity is reduced to half ..

 

[lombard]

anybody plz tell me about errors in practicals concerning heat.....

 

[MUIJI]

ANYBODY online right now can help me out in determining errors in practical concerning heat ??????????? plz reply as soon as possible

 

[7devilsallaround]

yes when repeat ou readings js like in time its actualy we r reducing error so whn we take 2 reading for each set n then take average it means uncertanity is reduced to half ..

SO if its like t=(t2-t1), then uncertainty in t is (0.1 / 2)/t , assuming uncertianty for a single reading of time is 0.1 seconds?

 

[broken angel]

anybody plz tell me about errors in practicals concerning heat.....

parallax error of thrmometer
fans n a.c intrpt result

 

[7devilsallaround]

ANYBODY online right now can help me out in determining errors in practical concerning heat ??????????? plz reply as soon as possible

You mean the limitations and improvements section at the end of Q2?

 

[broken angel]

SO if its like t=(t2-t1), then uncertainty in t is (0.1 / 2)/t , assuming uncertianty for a single reading of time is 0.1 seconds?

noooo..!!!
in this uncertanity is 0.2 cox both uncrtanitiex will add togethr
see!! m saying when we take 2 readings of oscillations n thn tke average here uncertanity ix halved

 

[talharulz]

winter 2011
paper 35 q2 ratta mar lo bs !!

 

[7devilsallaround]

noooo..!!!
in this uncertanity is 0.2 cox both uncrtanitiex will add togethr
see!! m saying when we take 2 readings of oscillations n thn tke average here uncertanity ix halved

Ooooh, so if adding values uncertainy gets halved, subtracting it gets doubled?

 

[broken angel]

Ooooh, so if adding values uncertainy gets halved, subtracting it gets doubled?

uncertanity doubles in addintn n sbtractn bt halved in tking average

 

[broken angel]

u hv n error n improvement suggextn abut heatng expriment ??

 

[shahyAmr]

can anyone help me solve (g)(ii) and(iii) in nov11 35 ??!
i never get this question and the marking scheme is so not helpful

 

[kristf]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w08_qp_31.pdf
sorry *question 1g ??

 

[7devilsallaround]

uncertanity doubles in addintn n sbtractn bt halved in tking average

Got it, thnx!

 

[shahyAmr]

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)............

heyy about measuring the angle of deflection of the rod .. hw do we measure it ??? i mean is it possible to use a protractor or is there another method ??

 

[kristf]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w08_qp_31.pdf
sorry *question 1g ??

 

[7devilsallaround]

u hv n error n improvement suggextn abut heatng expriment ??

Can't be quite sure unless I see an example question but these are usually accepted:
Errors: heat loss thru walls of container, water evaporates, and idk know to phrase this but its like human reaction error or something when you have to take a temperature reading and the corresponding time reading
Improvs: Insulation, lid, data loggers
If anyone has more please share.