how many of earth's atmospheres is on you at sea level?

http://csep10.phys.utk.edu/astr161/lect/earth/atmosphere.html

is it possible to give a number answer?

Yes. See the map in the link above. Count the layers over the earth.

is it 4?

Yes. :-)

To find out how many Earth's atmospheres are on you at sea level, we need to understand what is meant by "atmospheres" in this context.

The Earth's atmosphere is composed of layers of gases that surround the planet. These layers are held in place by gravity. Each layer of the atmosphere creates pressure, which we measure in units called atmospheres (atm).

At sea level, the average atmospheric pressure is approximately 1 atmosphere (1 atm). This means that the pressure exerted by the atmosphere at sea level is equivalent to 1 atm.

So, at sea level, you are subjected to the weight of 1 atmosphere of pressure. This pressure is evenly distributed all around your body, creating a balanced force. Therefore, we can say that at sea level, you are experiencing 1 atmosphere of pressure.

In conclusion, at sea level, there is approximately 1 atmosphere of pressure on you.