A uniform solid sphere of mass M and radius R has a moment of inertia of I = (2/5) MR2 for an axis passing through its center of mass. What would be the moment of inertia of this sphere for rotations about a similar axis parallel to the axis through the center of mass, tangent to the surface of the sphere?

A) (3/5) MR2
B) (1/2) MR2
C) (2/3) MR2
D) (5/7) MR2
E) (7/5) MR^2

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

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 =