Consider two electrons that interact with each other. classically, their interaction would be described in terms of the electrostatic force. in quantum mechanics, their interaction is interpreted in terms of emission and absorption of photons: one of the two electrons emits a photon with energy δe, which is then absorbed by the other electron after a short period of time. how long can the photon survive before it is absorbed without violating the uncertainty principle?

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explanation:

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 =