Answer:
The reason we can't feel it is that the air within our bodies (in our lungs and stomachs, for example) is exerting the same pressure outwards, so there's no pressure difference and no need for us to exert any effort.
Answer:
The value is 
Explanation:
From the question we are told that
The temperature is 
Generally the root mean square speed of the oxygen molecules is mathematically represented as

Here R is the gas constant with a value 
M is the molar mass of oxygen molecule with value 
So

=> 
Answer:
Average mass of acar in the US (in kg) = 1440 kg
Explanation:
Average mass of a car in the US (in g) = 1.440 × 10⁶ g
Mass in kg:

The organism may become ill or die
Answer:
3.63 hours or 3 and 37.5 minutes
Explanation:
200/55
Hope this helps :)