Use a GOAL experimental approach to design and carry out an experiment to answer the following question using only tape, a ruler, and a protractor:
How many excess electrons are there on the surface of a negatively charged tape?
Use the following information:
Guidelines:
Follow-up:
How does your number compare with the critical density of charge before sparking occurs?
The critical density is 5e-9 C/cm^2.
HW: Write up a group solution to this experimental problems using the GOAL strategy.