Almost never.
First ask them to speak to you privately and then ask them why did they say the things that they said. If they continue ask for your supervisor or teachers advise on how to stop it.
Sometimes you may be asked to evaluate your supervisor. When you do so, consider things such as how well your supervisor communicates and whether or not you feel that your supervisor is fair.
To get their rights! Teachers aren't happy about certain things. Teachers deserve rights!
teach
static energy
[initial response removed by WikiAnswers Supervisor]
Be the teachers pet and always get things right
A supervisor's salary typically is considered a fixed cost. The salary of a supervisor typically would not be variable, unless there were other things involved, such as bonus pay.
Things that are written in your contract.
Potential energy, or tension.
elastic potential energy
Inelastic things can not be stretched or do not rebound while elastic things will stretch, bounce, rebound, etc..