Initially each ball is charged separately with a Teflon rod so one ball has charge q1 and the other charge q2. Is the excess charge on each ball positive or negative in this case

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

How will the system respond to a temperature increase?

What is the equation for electrical work?