Answer :
Final answer:
Atmospheric pressure at sea level is 14.7 pounds per square inch (psi), equivalent to 101,325 Pascals (Pa) or 101.325 kilopascals (kPa) and also 760 mmHg. Option-C is correct.
Explanation:
Atmospheric pressure is the pressure exerted by the weight of air in the Earth's atmosphere. At sea level, average atmospheric pressure is conventionally measured as 14.7 pounds per square inch (psi), which represents the pressure exerted by a vertical column of air from sea level to the top of the atmosphere. In the context of the question, the correct answer is 14.7 pounds per square inch. When converting to metric units, this pressure is equivalent to 101,325 Pascals (Pa) or 101.325 kilopascals (kPa). One atmosphere (1 atm) is precisely this pressure level, and it is also equal to 760 millimeters of mercury (mmHg) when measured with a mercury barometer.
