A hydraulic press has one piston of diameter 4.0 cm and the other piston of diameter 8.0 cm. What force must be applied to the smaller piston to obtain a force of 1600 N at the larger piston

The  force is

Explanation:

From the question we are told that

   The first  diameter is  

   The second diameter is  

Generally the first area is  

=>      

=>      

The  second area is  

For a hydraulic press the pressure at both end must be equal .

Generally  pressure is mathematically represented as

=>  

=>  

=>    

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 =