a 1kg mass is thrown to a height of 20m. what is the potential energy at this height?...what is the kinetic energy at this height?..what is the kinetic energy as it hits the ground again?..with what velocity will it hit the ground?

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Explanation:

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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 =