Students in a physics lab are to determine the specific heat of copper. They heat 0.890kg of copper shot to 110º C and then carefully pour the hot shot into calorimeter cup containing 0.400kg of water at 20ºC. The final temperature of the mixture in the cup is measured to be 35ºC. If the aluminum cup has a mass of 0.067kg, what is the specific heat of copper?

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 =