PHYS170 & PHYS171

Course Information on WebAssign

WebAssign is web-based homework utility. Assignments to the class are posted by the instructor and students log on to do the assignments.

To Access WebAssign

1. Log On to WebAssign
Go to http://webassign.net

Institution: lhup
Password: this will be the same as your username. You can, and should, change this once you log on.
2. Obtain a WebAssign Access Code
You will have to purchase an Access Code Online

Notes on entering information using WebAssign

1. scientific notation - WebAssign uses scientific notation like that used in calculators. Some examples:

number scientific notationWebAssign Notation
122341.2234x1041.2234E+4
0.003443.44x10-33.444E-3

Exponents - You may be asked to enter variabls with exponents. For example, L2. The way to enter this into your answer is as follows:

L^2

3. precision -Unless the problems states otherwise, WebAssign will allow a 2% tolorance in your answers.

4. angles - WebAssign measures angles from the positive x-axis.

Going counterclockwise from the +x-axis use values from 0 to +1800 (positive values).
Going clockwise from the +x-axis use values from 0 to -1800 (negative values).

The figure below shows an example. There area 4 vectors. The angles of these vectors, according to WebAssign, would be referenced to the +x axis. WebAssign would say the vectors are located at the following angles:

WebAssign Vector A is located at angle +30o from the +x axis Vector B is located at angle +150o from the +x axis Vector C is located at angle -150o from the +x axis Vector D is located at angle -30o from the +x axis