Typically, a bullet leaves a standard .50-caliber rifle (29.0-in. barrel) at a speed of 853 m/s. if it takes 1.2 milliseconds to traverse the barrel, determine the average acceleration experienced by the 49.0-gram bullet within the gun amd then compute the average force exerted on it.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

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 =