Suppose a woman does 500 J of work and 9500 J of heat transfer occurs into the environment in the process. a. What is the decrease in her internal energy, assuming no change in temperature or consumption of food?
b. What is her efficiency?

the answer is 3.1 his answer is wrong mines is right

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

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 =