When gases, liquids, or solids are in contact with a moving object, the flow of occurs due to frictional forces

falling water hydro = water .. spectcular places these plants are

graph question answered .. you think better when you are relaxed and happy

the answer to this is proletariats.

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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 =