Measurements and Uncertainties

Errors - Random and Systematic
An Experimental Error means that there is a difference between the recorded value and the 'perfect' value.

There are two types: To estimate the uncertainty in a measurement, an Analogue Scale requires +/- half of the smallest scale division, and a Digital Scale requires +/- the smallest scale division.
 * Systematic Error - Occurs when there is an error in the setup or in the equipment
 * Random Error - Occurs due to human-related imperfections such as errors in observation

Vectors and Scalars
In Physics there are two types of quantities: Vectors and Scalars
 * Vectors are quantities with both direction and magnitude such as velocity
 * Scalars are quantities with only magnitude such as speed