ummm............................shoes!!
qualifying in a hot air balloon and a pilots license.
To keep the hot air flowing in the balloon.
What they do is blast cold air into the "hot" air and it makes the air molecules slow down... Thus it makes the air balloon decrease back to earth.
Because they like hairy measles
By releasing some of the hot air in a very controlled manner.
In theory, the larger the envelope on a hot air balloon (or the warmer the air inside compared to the ambient temperature outside), the more lifting force the balloon has. To answer your question, there is no single answer. Hot air balloons range in size from 70,000 cubic feet to over 200,000 cubic feet. (The "cubic feet" measurement refers to the volume of air inside the balloon envelope). Special shaped balloons can be enormous. The Energizer Bunny balloon is 15 feet taller than the Statue of Liberty. The ears alone are sixty feet...which is the height of an entire average-sized hot air balloon.
A basket and a bag supported with wires for the balloon part
What they do is blast cold air into the "hot" air and it makes the air molecules slow down... Thus it makes the air balloon decrease back to earth.
630 feet
Glue a balloon to a little toy car. Blow up the balloon, without tying the end. Set the car with balloon on the ground and watch the car be propelled by the air coming out of the balloon for about 15 feet.
Airline pilots wear two seat belts - one over their waist, and one over their outside shoulder (left for pilot, right for co pilot)
128,177 feet (39,068.5m)