in your lab, you are timing a chemical reaction. an astronaut travelling past your laboratory at u 0.866c observes the process to take 2.23 s. what time did you observe for the process?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more