A system of lenses has light passing through a converging lens and then through a diverging lens. An object is 1.70 cm to the left of the converging lens, the lenses are 4.30 cm apart, and the focal length of the converging lens is 1.00 cm. Required:
Draw the ray diagram for the image formed by this system of lenses.

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 =

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