Two-point charges q1 and q2 are held 4.00 cm apart vertically. An electron released at the middle point that is equidistant from both charges undergoes an initial acceleration of 8.95 X 10^18 m/s2 directly upward, parallel to the line connecting q1 and q2. Find the magnitude and direction of q1 and q2

2.55*10^5 C

Explanation:

The forces due to q1 and q2 charges, accelerates the electron that is in the middle of the distance between the charges. That is

If the electron is accelerated upward. Hence we have

where we have taken r=2cm=0.02m; mass of electron=9.1*10^-31kg

charge of the electron=1.6*10^-19C

Hope this helps!!

no. dot product   =0 when vecs at right angles

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 =