You place a book on a table. Someone asks you to draw the forces acting on the book. What force diagram do you show them?

this is a good question! i'll do some research and come back when i have the answer!

number of electrons for neutral cl

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =