What is the standard sea-level density?

What is the standard sea-level density?

• A. 1.0
• B. 1.225
• C. 1.15
• D. 1.3

Answer: (B)

Air density at sea level under standard atmospheric conditions is 1.225 kilograms per cubic meter. This value comes from the International Standard Atmosphere (ISA) at about 15°C and 1013.25 hPa, assuming dry air. It’s the reference density used for calculating lift, thrust, and overall performance in drone operations. Real conditions vary with temperature, pressure, and humidity, so actual density can differ, but 1.225 kg/m^3 is the defined standard. The other numbers don’t match this official reference.

Air density at sea level under standard atmospheric conditions is 1.225 kilograms per cubic meter. This value comes from the International Standard Atmosphere (ISA) at about 15°C and 1013.25 hPa, assuming dry air. It’s the reference density used for calculating lift, thrust, and overall performance in drone operations. Real conditions vary with temperature, pressure, and humidity, so actual density can differ, but 1.225 kg/m^3 is the defined standard. The other numbers don’t match this official reference.