What pressure does air exert at sea level?
A) 1 pound per square inch (psi)
B) 12.3 pounds per square inch (psi)
C) 14.7 pounds per square inch (psi)
D) 29.92 pounds per square inch (psi)
Answer: C
Explanation: A) Incorrect. At sea level, air exerts a pressure of about 14.7 pounds per square inch (psi).
B) Incorrect. At sea level, air exerts a pressure of about 14.7 pounds per square inch (psi).
C) Correct. At sea level, air exerts a pressure of about 14.7 pounds per square inch (psi).
D) Incorrect. At sea level, air exerts a pressure of about 14.7 pounds per square inch (psi).
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