In scientific notation, the radius of each bacterium in a petri dish is 3.15 × 10-7 meter. the radius of the bacterium written as a decimal number in standard form is meters?

Radius of bacterium is given as

now we know that

now using the above value

so above is the standard form of the representation.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

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 =