A negative charge of - 0.0005 C exerts an attractive force of 9.0 N on a second charge that is 10 m away. What is the magnitude of the second charge?

q₂ = 0.0002 C

Explanation:

Given that,

Charge, q₁ = -0.0005 C

The force between two charges, F = 9 N

The distance between charges, d = 10 m

We need to find the magnitude of the second charge. The force acting between two charges is given by :

So, the magnitude of the second charge is 0.0002 C.

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 =