Arace car has a mass of 820 kg. it starts from rest and travels 50.0m in 3.0s. the car is uniformly accelerated during the entire the time. how big is the net force acting on the car?

they should be similar or the same

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 =