Think about examples of the way the word momentum is used in everyday speech. How are they related to the meaning of
momentum in physics?

50 inches should be the resultant vector

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

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 =

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.