A 2000 kg car rounds a circular bend with a radius of 20 meters. The car is traveling 12 m/s around the bend. What is the centripetal acceleration? What is the centripetal force on the car?

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 =