Material Specific Heat
(J/g*C)
% Error
(deviation from known)
Water
4.18
Concrete
0.88
Wood
1.80
Aluminum
0.90
Glass
0.84
Sand
0.83
Steel
0.49
Iron
0.44
Copper
0.38
Lead
0.16
Gold
0.13

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

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 =