Lois Lane falls for 10s. Superman catches her, bringing her to a halt in 10cm. Lois has a mass of 50kg. How much force does superman inflict on her spine? * A) 500N
B) 2500000N
C) 25000N
D) Can't solve without superman's mass
show your work please

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 =

answerdmitry mendeleyev made a workable classification of the elements