WebWork Guide
WebWork Guide
Units
Every number deserves a unit. Every time you write or enter a number you should think about the unit of the number. There are some cases (radians, cycles, etc.) where we consider the numbers unitless but you should still think about those cases.
WebWork will require you to enter units for most answers. The units I use in this class are summarized here.
| Unit | Symbol | WebWork Abbreviation |
|---|---|---|
| degrees | ° | deg |
| radians | rad | |
| Amperes | A | A |
| Volts | V | V |
| Ohms | Ω | ohm |
| Hertz | Hz | Hz |
| seconds | s | s |
| minutes | min | min |
| Coulombs | C | C |
| Farad | F | F |
| Joules | J | J |
| Watts | W | W |
Exponential Notation
Unfortunately WebWork does not accept all SI prefixes. Therefore, all numbers should be entered using exponential notation. A table below has a number of examples.
| Value | WebWork Entry |
|---|---|
| 45° | 45 deg |
| 1.25mA | 1.25E-3A |
| 5kJ | 5E3 J |
| 1.1pF | 1.1E-12F |
Functions
| Description | WebWork Symbol |
|---|---|
| Add | + |
| Subtract | - |
| Multiply | * |
| Divide | / |
| Natural Exponential | exp() |
| Sine | sin() |
| Cosine | cos() |
Time-domain
| Value | WebWork Entry |
|---|---|
| 6cos(1500t-45°) | 6*cos(1500*t-(pi/4))
|
| 12cos(700t+50°) | 12*cos(700*t+50*(pi/180))
|