22. A ball is thrown straight up to a height of 20 meters and it falls straight down and is caught at the starting point.
A. What is the distance of the ball?
B. What is the displacement of the ball?

ok

Explanation:

what is the starting point. you need the starting point to answer the question

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

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 =