A 0.200-kg ball traveling horizontally on a frictionless surface approaches a very massive stone at 20.0 m/s perpendicular to the stone and rebounds with 70.0% of its initial kinetic energy. What is the magnitude of the change in momentum of the stone?

i agree kid

explanation:

a

answerscientific theory;

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 =