3 ms·
The people living near airports don't want things flying faster than the speed of sound near them. Also, starting at about .78 times the speed of sound, the en
by hollerith 3y ago
The people living near airports don't want things flying faster than the speed of sound near them.
Also, starting at about .78 times the speed of sound, the energy needed to fight against air friction (drag) increases drastically, and air travel is energy-expensive enough below .78 times the speed of sound.