Which study involves the collection of information supported by opinions? the study of the effect of playing in the rain on catching a cold the study of the effect of a full moon on human behavior the study of the effect of economic status on traveling the study of the effect of economic status on eating out

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

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 =