An insulated beaker with negligible mass contains liquid water with a mass of 0.250 kg and a temperature of 84.4 ∘c .
how much ice at a temperature of -10.6 ∘c must be dropped into the water so that the final temperature of the system will be 21.0 ∘c ?
take the specific heat of liquid water to be 4190 j/kg⋅k , the specific heat of ice to be 2100 j/kg⋅k , and the heat of fusion for water to be 3.34×10^5 j/kg .

falling water hydro = water .. spectcular places these plants are

where are the vectors ?

where is the photo and the answer choices?

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 =