Which are characteristics of electromagnetic waves? Check all that apply. 1. travel in straight lines and can bounce off surfaces
2. travel through space at the speed of light
3. travel only through matter
4. travel only through space
5. can bend around objects
6. move by particles bumping into each other
5. move by the interaction between an electric field and a magnetic field

answer///terminator or twilight zone;

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 =