De Rozier's experimental system consists of a hydrogen balloon and a hot air balloon tied together. Tragically, the craft explodes half an hour after takeoff. This double balloon helium/hot air ...

This is the shocking moment a hydrogen balloon caught fire in a Chinese restaurant. Surveillance footage shows an elderly woman carrying a child on her right arm, the youngster holding a pink ...

A balloon filled with helium and one filled with hydrogen are ignited. Hydrogen provides a loud explosion and flame. He(g) + O 2 (g) → N.R. Light the candle on the end of the yardstick and lower the ...