an object experiences buoyant force of 15.9 n when immersed in a fluid of density 917 kg/m^3. what is the volume of the object?

volume = 1.02m³

Explanation:

F= density x g

g = F/density

g = 15.9/917 = 0.017m/s²

F = m x g

15.9 = m x 0.017

m = 15.9/0.017 = 935.3kg

density = mass/volume

917 = 935.3/volume

volume = 935.3/917 = 1.02m³

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 =