The atmospheric pressure at sea level is approximately 1 atm (one atmosphere).
According to the provided reference, the unit 'atm' is roughly equivalent to the average atmospheric pressure at sea level on Earth. This means that at sea level, the force exerted by the weight of the air above is typically around 1 atmosphere.
Here's a simple breakdown:
- Atmosphere (atm): This unit measures pressure, specifically the pressure exerted by the Earth's atmosphere.
- Sea Level: This is the average height of the ocean's surface, used as a standard reference point for measurements like atmospheric pressure.
- 1 atm: This numerical value represents the average atmospheric pressure at sea level.
Essentially, when you are at sea level, you are experiencing roughly one atmosphere of pressure pressing down on you. This pressure is due to the weight of all the air in the atmosphere above you.
