Một chất điểm dao động điều hoà với phương trình: x = 6 cos(20t+ Pi ) (cm), trong đó thời gian t được tính bằng giây. Khi chất điểm có li độ 2 cm thì tốc độ của nó Là

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

the answer is to check all of them! they all apply well at least i think so!

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 =