You are walking In paris alongside the eiffel tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy dandy Tourist guidebook you find that the height of the eiffel tower is 300.5 m. Calculate how many seconds the croissant dropped before it tagged you on the head

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.

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

probably not if net force is zero

k2s for potassium sulphide