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View detailed breakdowns and explanations below.
📘 Reference Values
1 atm = 14.7 psi
1 atm = 1.013 bar
1 atm = 101.3 kPa
1 atm = 760 mmHg
🧠 Underwater Pressure
For every 10 meters (33 ft) you go underwater, pressure increases by 1 atm. At 10m depth, total pressure is 2 atm (1 from air + 1 from water).
✍️ Weather Maps
Meteorologists use "milibars" (mb) or hPa. 1000 mb is roughly 1 atm. Low pressure systems (<1000 mb) bring storms.
📊 Vacuum
0 atm is a perfect vacuum (Outer space). You cannot have negative atm pressure.
✅ Key Takeaways
- It defines "Standard Temperature and Pressure" (STP).
- Crucial for chemistry gas laws.
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