An electron moving along the +x axis enters a region where there is a uniform magnetic field in the +y direction. what is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

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 =