How many joules are in 3.5kJ?

3.5 Kilojoules (kJ)=3,500.0 Joules (J)

1 kJ = 1,000.0 J 1 J = 1.0e-03 kJ

3500 joules

Explanation:

Multiply the value by 1000.

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 =

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y