The temperature at which water boils depends mainly on ____________?
Correct answer: C. Air pressure
- A. Air temperature
- B. Relative humidity
- C. Air pressure
- D. Air density
- E. The specific heat of air
Explanation
Boiling occurs when a liquid's vapour pressure equals the surrounding pressure, so water boils at a lower temperature on high mountains and a higher temperature in a pressure cooker. Air temperature and humidity do not primarily set the boiling point.
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