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That question is answered by looking at the altimeter.
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Where do airplanes leave ground?
airports
How do jet airplanes get of the ground?
Gravity.
What is the difference between cars and airplanes?
Cars = ground transportation Airplanes = air transportation
Can jet airplanes go backwards on the ground without help?
No
What is the name of the person who directs airplanes with flags?
The ground marshall.
How far can giant paper airplanes go?
very far up not down
What is the similarities for airplanes and rockets?
They both rise up off the ground
What is the importance of airplanes and the impact the airplanes have had on peoples lives?
Airplanes provide faster travel, especially for places that are far away. They made it possible for people to travel to places that are far away faster, and for trade between distant places to be faster and easier.
Did Romans have airplanes and helicopters?
Ancient Romans - no, not as far as we know.
How do airplanes land on the ground?
They slow down gradually and lose height as they land
How do airplanes refuel?
Airplanes refuel in the ground. Trucks carrying airplane fuel come and refuel the aircraft.Some jet aircraft have the capability of refuelling in the air.
Do airplanes have any friction?
Yes. Airplanes experience drag from the air when in flight and friction from the ground when they are taxiing. There is also friction between parts in the plane.
