A particle is moving in a straight line and its momentum is given by p with rightwards harpoon with barb upwards on top. We can conclude that capital delta p with rightwards harpoon with barb upwards on top subscript perpendicular equals 0 with rightwards harpoon with barb upwards on top kg m/s

your answer is c! hope this : )

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 =