Simviation Forums

Phew, in the middle of a looong planning lab on the discharge of capacitors.

I need to calculate the error so that I can place error bars on a graph I need to give gradient 1/RC (I'm trying to determine RC time).

Here's the question (my physics teacher told me he would look it up for me but he plainly forgot):

What happens to the error when you take the Natural Logarithm?
I know the standards for BODMAS and root and square functions, but no-one has ever mentioned what it is for logs/natural logs.

That would help me to calculate the correct errors.
Thanks a lot!

http://mathworld.wolfram.com/NaturalLogarithm.html
I dont have a clue what its about
Nextime you have a problem google it first and it will probably get done quicker

I've always hated electricity as a course, ever since some back-stabbing bimbo teacher flunked my out of my engineering-studies by not letting me pass by one single point...

Anyway... Logarithms... let me tell you one thing... how quick you forget after leaving school... Sorry dude... you're on your own... or call hagar...

http://mathworld.wolfram.com/NaturalLogarithm.html
I dont have a clue what its about
Nextime you have a problem google it first and it will probably get done quicker

I did google it with no results; and I know very well what a Natural Log is already.
I'm not trying to find out what logs and natural logs are, I know that already, but I want to know what happens to the error of a value when its log is taken.

Anyways, thanks for the replies I will probably have to send a mail to my physics teacher.

This is for the error (aka uncertainty):

I will explain with the example y=lnx

To find the error for y, known as Ey, use:

Ey=Ex/x

Where Ex is the value for the error of x.

P.S use this site.  It is very good for errors.  Errors

Yesssss i understand that *WINK WINK*

This is for the error (aka uncertainty):

I will explain with the example y=lnx

To find the error for y, known as Ey, use:

Ey=Ex/x

Where Ex is the value for the error of x.

P.S use this site.  It is very good for errors.  Errors

Thanks LOADS Delta!!!