Speed deamplifier. block 1 of mass m1 slides along an x axis on a frictionless floor at speed 4.00 m/s. then it undergoes a onedimensional elastic collision with stationary block 2 of mass m2 = 2.00m1. next, block 2 undergoes a one-dimensional elastic collision with stationary block 3 of mass m3 = 4.00m1. (a) after all the collisions, what is the speed of block 3?

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 =