0
Is it true that hot air balloons were flown before hydrogen balloons were flown?
Wiki User
∙ 7y ago
Yes, hot air balloons flew first. Though I don't know the exact details, as the history is so diverse, spread over many years, and even includes the candle lit paper hot air balloons released at parties or festivals. It would take some research on the internet to get the full details.
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
How balloons and blimps are able to fly in oceans of air?
Balloons float because of the same principal as how ships float: bouyancy. A ship displaces a volume of water. If the ship's weight is less than the volume of water that it displaces, then it will float. Same is true for a balloon. It displaces a volume of air. If the Hydrogen or Helium in the balloon weighs less than the volume of air it displaces, then it will rise.
Is it true stars like the sun burn hydrogen producing helium?
All stars fuse hydrogen into helium - the slight difference in atomic weight between 4 hydrogen atoms and one helium atom, is given off as radiation.
True or false a main sequence star generates energy by fusing helium into hydrogen?
Oops ! No. The statement is going along pretty good until the end.The star actually fuses hydrogen into helium .
Why is a fuel cell useful in spacecraft?
because hydrogen is in the fuel cell. hydrogen is useful in many things including spacecrafts. please do not use this for anything important because I'm not sure but i been reading this page about hydrogen and it is true. I know for sure that hydrogen is used for rocket fuel because it is on the sheet. By Georgina thank you 4 going on wikianswers.com
Why is a high altitude hot air balloon only partially filled?
As it rises, outside air pressure decreases, and the hot air inside expands and fills the balloon. Same thing is true of large helium balloons.
Is Twenty-One Balloons based on a true story?
no
What were the Wright Brothers the first to do?
They made the first powered, controlled flight in a heavier than air vehicle. In Kitty Hawk North Carolina, Wilbur and Orville Wright kept their plane in the air for 12 seconds but they were still recorded as the first people to fly in a powered craft. Many other people had flown before using hot air balloons or gliders but these were not considered true aeroplanes.
Is this true or false Hydrogen-1 and hydrogen-2 differ in that hydrogen-2 has one neutron hydrogen-1 has none?
Yes it is true. All isotopes differ in the number of neutrons only.
Which of the following statements is NOT true about hydrogen sulfide?
hydrogen sulfide is not hazardous
What is a true statement about hydrogen?
One true statement about hydrogen is that it is molecule that makes up h2o also known as water.
Hydrogen bonding is a weak attractive force?
True
How balloons and blimps are able to fly in oceans of air?
Balloons float because of the same principal as how ships float: bouyancy. A ship displaces a volume of water. If the ship's weight is less than the volume of water that it displaces, then it will float. Same is true for a balloon. It displaces a volume of air. If the Hydrogen or Helium in the balloon weighs less than the volume of air it displaces, then it will rise.
Explain the significance of hot air balloons to meteorologists?
Not much. While it's true that meteorologists do use balloons to send up weather probes, they tend to use gas balloons instead. It's simpler, cheaper and works better in their conditions.
Jupiter is mostly made up of hydrogen and helium true or false?
True. Jupiter is consisted of mainly hydrogen and helium. 90% hydrogen, 8% helium and 2% other gases
Water H2O is composed of hydrogen and oxygen true or false?
True
The first element on the periodic table of elements is hydrogen?
is it true or false
Hydrogen bonds are weaker than the bond that holds hydrogen to oxygen in a water molecule?
True
