3. A cross-country skier with an initial forward velocity of +4.42 m/s accelerates uniformly at 0.75 m/s2. a. How long does it take the skier to come to a stop? b. What is the skier's
displacement in this time interval?

spectral lines lyman is one set

i think it's 35 meters

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 =