Paul Barrett

This page lists questions and answers that were posted by visitors named Paul Barrett.

Questions

The following questions were asked by visitors named Paul Barrett.

If a bird at sea level requires a speed of 30 mph to have enough lift to fly, how fast must it fly for the same lift at 20,000 ft?

Answers

The following answers were posted by visitors named Paul Barrett.

At sea level 0.0765 lb/cubic ft At 20,000 ft 0.049 lb/ cubic ft

Thank you very much for your help!