Select earth in the menu box so that there is now a force of gravity. now the total energy of the weight/spring/earth system is the sum of the kinetic energy, the elastic potential energy, and the gravitational potential energy. when is the kinetic energy a maximum? (it may to watch the simulation in slow motion).

elctricity and magnet is conversion to it

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 =