Why is the term impulsive of force coined

Impulse of force is a process of reducing and minimizing the impact of force on the object.

Explanation:

If an impact stops the moving object then the change in momentum will become a fixed quantity, extending the time of collision and reducing the time of impact.

For example, If a person jumps to the ground with a certain height the person will bend knees to extend the time of collision while hitting the ground and reducing the time of impact to prevent much injury.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

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 =