a 70 kg astronaut pushes a spacecraft with a force in space. the spacecraft has a total mass of 1.0 x 104 kg. during the push the astronaut accelerated to the right with an acceleration

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

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 =