What is the magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 49 rpm (revolutions per minute) if the wheel's diameter is 42 cm

i think the answer is a, hope this : )

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 =