What is the temperature decrease rate with altitude up to about 35,000 feet?

What is the temperature decrease rate with altitude up to about 35,000 feet?

• A. 1°C per 1,000 feet
• B. 2°C per 1,000 feet
• C. 3°C per 1,000 feet
• D. 4°C per 1,000 feet

Answer: (B)

The correct answer is that the temperature decreases at a rate of 2°C per 1,000 feet up to about 35,000 feet. This phenomenon is due to the standard lapse rate in the troposphere, which is the lowest layer of Earth's atmosphere. As altitude increases, the air pressure decreases, causing the temperature to drop. This lapse rate of approximately 2°C for every 1,000 feet is a crucial factor in aerospace physiology as it influences various aspects of flight, such as cabin pressurization and thermal comfort. Understanding this rate is essential for pilots, as it affects aircraft performance, weather patterns, and the physiological responses of the crew and passengers to altitude changes. While other temperature decrease rates are presented in the choices, they either do not accurately reflect the standard lapse rate experienced in the troposphere or apply to different altitudes or conditions.

The correct answer is that the temperature decreases at a rate of 2°C per 1,000 feet up to about 35,000 feet. This phenomenon is due to the standard lapse rate in the troposphere, which is the lowest layer of Earth's atmosphere. As altitude increases, the air pressure decreases, causing the temperature to drop.

This lapse rate of approximately 2°C for every 1,000 feet is a crucial factor in aerospace physiology as it influences various aspects of flight, such as cabin pressurization and thermal comfort. Understanding this rate is essential for pilots, as it affects aircraft performance, weather patterns, and the physiological responses of the crew and passengers to altitude changes.

While other temperature decrease rates are presented in the choices, they either do not accurately reflect the standard lapse rate experienced in the troposphere or apply to different altitudes or conditions.