Aplane flies 470 km east from city a to city b in 45.0 min and then 966 km south from city b to city c in 1.50 h. for the total trip, what are the (a) magnitude and (b) direction of the plane's displacement, the (c) magnitude and (d) direction of its average velocity, and (e) its average speed?

a) 1074.27 km

b)

c) 477.453 km/h

d) 638.22 km/h

Explanation:

From Pythagoras theorem

AC² = AB²+BC²

Displacement = 1074.27 km

Direction =

Average velocity

Average velocity = 477.453 km/h

Average speed

Average speed = 638.22 km/h

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 =