An average plane flies between 5 to 10 km above the surface of the earth. Planes cannot fly below or above the altitude. After this altitude there is not much air.
Around 11km
70,000ft / 21.000 km
a plain ? what is that ?
if something takes X hours to travel Y km it's average speed is Y/X km/hourIn this case it's 820 km/hour
Concorde had an average cruise speed of Mach 2.02 (about 2140 km/h or 1330 mph)
military aircraft will fly at any height. one tactic they use to avoid radar is to fly as low as possible as low as 10-20 m. there are aircraft used in military operatrions that fly as high as 80,000 ft or 24 km above the ground.
208,000 meters.
dragonflies normally fly between 7 to 9 ft. above or near water.
fireflies fly at about 8-10m/sec.
Crows can fly at speeds of up to 48-82 km/h (30-50 mph) depending on the species and environmental conditions.
An average space shuttle orbits in the high thermosphere, which is 120-600 km above sea level
a small airplane flies in a straight line at a average speed of 150 km/hour .how long dose it take the plane to fly 250 km