Phy 1053. I want to convert 56.7 lbs. To Kg. I do that using the following calculations:
56.7lbs * 1 Kg/ 2.208 lbs

What is the ratio 1 kg/ 2.207 lbs. That makes this unit conversion possible. Explain

not too sure thinking all accelerations are pointed down

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 =