Observe yourself breathing and count the number of times you inhale per second. during each breath you probably inhale 0.66 l of air. assume the pressure is 1 atm and the temperature is 20∘c. only about 21% of air is o2. 1. how many oxygen molecules do you inhale if you are at sea level?

To solve this exercise it is necessary to apply the concepts related to Robert Boyle's law where:

Where,

P = Pressure

V = Volume

T = Temperature

n = amount of substance

R = Ideal gas constant

We start by calculating the volume of inhaled O_2 for it:

Our values are given as

P = 1atm

T=293K

Using the equation to find n, we have:

Number of molecules would be found through Avogadro number, then

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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