uh, find out your self.
olden day hot air balloons were made of heavy cotton or linen fabric and carried animals, while modern hot air balloons are made out of heat resistant nylon and carried people hope this helps if this isn't what you're looking for here are some other websites to try http://www.hotairballooning.com/faq/entry/how_do_balloons-fly-29.html or http://www.eballoon.org/history/history-of-ballooning.html these websites are really useful for projects :D
Hot air is used for hot air balloons.
The wind between the balloons creates a lower pressure in the air, so the air around it pushes the balloons together.
hot air balloons
plastic balloons lose air because particles are moving in the balloon and leave it
Modern Hot Air Balloons are made of heat resistent Nylon. The olden day ones were made of heavy cotton or linen fabric. Hope that helps ♥ :)
olden day hot air balloons were made of heavy cotton or linen fabric and carried animals, while modern hot air balloons are made out of heat resistant nylon and carried people hope this helps if this isn't what you're looking for here are some other websites to try http://www.hotairballooning.com/faq/entry/how_do_balloons-fly-29.html or http://www.eballoon.org/history/history-of-ballooning.html these websites are really useful for projects :D
The similarities are that they both need air to fly. Bernoulis principal of flight occurs with both.
Nylon
Modern hot air balloons do not have sand bags because the air input is easily controlled for lift. Hot air balloons used to have sandbags to weigh them down until lift off and sand was gradually dumped to gain height in the air.
air balloons or hot air balloons fly because they fill with a very light type of air. The air is hot air.
Hot air is used for hot air balloons.
hot air balloons and balloons
The wind between the balloons creates a lower pressure in the air, so the air around it pushes the balloons together.
hot air balloons
Hot air balloons float because hot air displaces cool air in the atmosphere
plastic balloons lose air because particles are moving in the balloon and leave it