An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530m/s in seawater. How deep it the water directly below the vessel if the time delay of the echo to the ocean floor and back is 8s

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

hope this : )

explanation:

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 =