physics p52 how to take (log of error, square of error)

[aqua]

hey guyz

can any one help me how to find:

log of errors?
e.g O/N/07 Q2 (log errors)

and square of errors?
e.g M/J/07

(in this part i cannot understand how hey got square of errors)

the answers were

+-4.6 -5.0
+-7.8 -11.4
+-11.0-11.4
+-14.2-14 or 15
+-17 or 18
+-20 or 21

plz help me

thank u

 

[aqua]

guyz i got the answer
i am posting the answer for others to understand as well

O/N 09 paper5 qn no 2...


for 51
that uses log the error can be calculated by:
log x - log y
where x is the original value and y is maximum value for R
e.g log990 - log1000
and you have the +- error

for 52 that uses squaring t:
change in t divided by t multiply by t square and 2
e.g 0.01/0.35 x 2x 0.123
where 0.123 is the value of t square.

i hope u get it.

cheers

 

[solidsnake]

can you please explain 52 method again by giving an example from june 07 ?

thanks. JazakAllah.

 

[Afghan]

How do we find the error when dividing or multiplying the factors with errors, like in M/J 2010 p51, finding the errors in the second column...how did they find it?
Can anyone please help me with this?