What is the standard temperature and pressure at sea level?

The standard temperature and pressure at sea level are defined as 15 degrees Celsius (C) and 29.92 inches of mercury (inHg). This is the universally accepted standard for various scientific and aviation purposes, allowing for consistent calculations and comparisons across different scenarios.

Although option B suggests a temperature of 59 degrees Fahrenheit (F) and a pressure of 29.92 inHg, the correct temperature in Celsius is 15 C rather than the equivalent in Fahrenheit, which is often used as a point of reference in colloquial discussions.

The right choice emphasizes the fact that at sea level, the atmospheric pressure is indeed 29.92 inHg, which corresponds to the standard atmospheric pressure. This pressure is crucial for calculations in aerodynamics, as it affects aircraft performance and behavior under varying flight conditions.

Additionally, knowing the standard temperature is essential for engineers and pilots when determining air density and performance metrics, as deviations from standard conditions can significantly impact flight characteristics.