Mission NL7: Newton's Second Law An object has an acceleration of 3.0 m/s/s. If the net
force experienced by the object is decreased by a
factor of 2.1 and if the mass of the object is decreased
by a factor of 3.4, then the new acceleration would be
m/s/s. Enter a numerical answer, accurate to the
second decimal place.

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 =

prndulum needs thread, weight clock to time swings

answergravity;