"i can not login the webpage, so i can not do the homework"
I am not sure if this means the course web page or the
Mastering Physics web page.
If you have a valid Mastering Physics student access code,
then you can follow the procedure listed in the course web page
under the link "Mastering Physics -- how to register."
The course ID is
and you have to click on the "class list" link at
ERROR AND UNCERTAINTY
This has been revised slightly on Friday Jan. 27, but just
to improve the clarity. If you printed it out earlier, the
version you have is OK. This document contains
instructions that apply to ALL labs in this course and
also in Phy 132/134. You should print out a copy and
There is a 1 page item, also pdf, called:
PHYSICS 133 Spring 2006 EXPERIMENT NO. 1
MEASURING AREA & ERROR ANALYSIS
This is the specific instructions for Lab # 1. It was
revised slightly on Wednesday January 25, so if you
printed a copy earlier, you might want to make a new one.