The oldest wants to be a computer programmer and the middle one wants to be a lawyer today. About how many people work on a space ship at a time The shuttle carries 7 to 10 people on most missions. Most airplanes are made out of aluminum, steel, and other metals. Metals are refined from ores mined out of the earth. Explain more, please, about how flow visualization works.
Tufts are pieces of yarn that are taped or glued to the model.
As the wind blows over the model the tufts follow the wind and show the engineer where the air is going. I was 25 years old. I have never played in a wind tunnel. Some of the tests have been fun but a wind tunnel can be a dangerous place if mistreated. I missed your question.