Physics P5 All Info You Need !!

[Aries_95]

Guys, check this out as well...hope it helps you
https://www.xtremepapers.com/community/threads/physics-p-5.27460/

 

[AlishaK]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_51.pdf
Q1- How do we increase the speed? Guide me with this exp.
Aries_95
Please.

 

[AlishaK]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_51.pdf
Q2- C (iv)
For this one SalmanslK
Aries_95
Thanks.

 

[Aries_95]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_51.pdf
Q1- How do we increase the speed? Guide me with this exp.
Aries_95
Please.

The pole should be attatched to a rotating device such as a motor.. the faster the device rotates, the higher the spped

 

[Aries_95]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_51.pdf
Q2- C (iv)
For this one SalmanslK
Aries_95
Thanks.

For question 2-C(iv):

lgY=lgS+lgI (r)

use a value of lgY form the table. for the same value, use the value of lgI
Ex: if we use lg Y=0.41 then use lgI= 1.70 and the value of gradient will be used for r.
Rearranging this, you will get the value for lg S which is the y- intercept..
Hope you understand it

 

[AlishaK]

For question 2-C(iv):

lgY=lgS+lgI (r)

use a value of lgY form the table. for the same value, use the value of lgI
Ex: if we use lg Y=0.41 then use lgI= 1.70 and the value of gradient will be used for r.
Rearranging this, you will get the value for lg S which is the y- intercept..
Hope you understand it

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_51.pdf

The first and last error bars are flying outa the graph?!! nd the bars r huge? And how do I draw the worst fit line?
Help yo!
Thanks a looot!

 

[AlishaK]

The pole should be attatched to a rotating device such as a motor.. the faster the device rotates, the higher the spped

did u read the question? I mean...We have to make the device rotate faster by some means? Is it possible for u to show me the diag?

 

[AlishaK]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_51.pdf

The first and last error bars are flying outa the graph?!! nd the bars r huge? And how do I draw the worst fit line?
Help yo!
Thanks a looot!

Also, the y-intercept. isnt it the last reading?
In general how do we find the uncertainty for y-intercepts?!

 

[Trash Can]

how to draw the error bar when the errors are in the x-axis???are they sideways??? also,how to draw the worst acceptable line then??is it from the extreme right (highest) of the first point to the extreme left of the last point???plz reply anyone..ASAP..plzz help..!!

 

[AlishaK]

For question 2-C(iv):

lgY=lgS+lgI (r)

use a value of lgY form the table. for the same value, use the value of lgI
Ex: if we use lg Y=0.41 then use lgI= 1.70 and the value of gradient will be used for r.
Rearranging this, you will get the value for lg S which is the y- intercept..
Hope you understand it

yea bt the uncertainty.. ?

 

[Aries_95]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_51.pdf

The first and last error bars are flying outa the graph?!! nd the bars r huge? And how do I draw the worst fit line?
Help yo!
Thanks a looot!

No..they are not....you have to draw the error bars keeping in mind that lg T is on Y axis. the worst fit line is made by joining the top of the error bar on one end with the bottom of th last one ( You can do it vice versa)...hope you understand

 

[AlishaK]

No..they are not....you have to draw the error bars keeping in mind that lg T is on Y axis. the worst fit line is made by joining the top of the error bar on one end with the bottom of th last one ( You can do it vice versa)...hope you understand

Can u tell me the values (first and last) of ur error bars? Please! Please!

 

[Aries_95]

yea bt the uncertainty.. ?

Calculate the y intercept using the same values of Lg Y and lg I but use the gradient of the worst fit line. subtract the answer for the best fit line from the worst fit line and you geet the uncertainity

 

[AlishaK]

how to draw the error bar when the errors are in the x-axis???are they sideways??? also,how to draw the worst acceptable line then??is it from the extreme right (highest) of the first point to the extreme left of the last point???plz reply anyone..ASAP..plzz help..!!

Aries_95
Yes my question too...worst fit line for error bars in the x axis. :/

 

[Aries_95]

Can u tell me the values (first and last) of ur error bars? Please! Please!

first error bar: 0.004
last error bar: 0.006

 

[Aries_95]

Y

Aries_95
Yes my question too...worst fit line for error bars in the x axis. :/

es this is right...it can be the other way round as well...it may be from the extreme left to extrme right

 

[AlishaK]

first error bar: 0.004
last error bar: 0.006

Bu-ut why M i getting 0.04 and 0.06 ?
:'(

 

[Aries_95]

Bu-ut why M i getting 0.04 and 0.06 ?
:'(

i calculated them like this:
[lg(1.96+0.2)-lg(1.96-0.2)]/2
Try calculating them using this method.

 

[AlishaK]

i calculated them like this:
[lg(1.96+0.2)-lg(1.96-0.2)]/2
Try calculating them using this method.

aaaaaaa...ohkay..
Thanks.
Do we always do it that way for lg uncertainties?

 

[Aries_95]

Yup.

aaaaaaa...ohkay..
Thanks.
Do we always do it that way for lg uncertainties?

The general formula is:
[Lg(Max)-lg(min)]/2