According to the Can Manufacturers Institute, the energy used to make an aluminum can from recycled aluminum is 5%% of the energy used to make an aluminum can from virgin ore. In a typical year, 1.7 billion pounds of aluminum cans are recycled. Part A How much energy is thermally transferred to get this mass of aluminum from 20 ∘C∘C to its melting point, 660 ∘C∘C?

f=ma newton's second law 7x8=56n

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 =