Swedish engineer Salomon August Andrée and two companions wanted to fly a hydrogen balloon over the North Pole. Their Arctic ...

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 ...

Immediately before lecture, inflate desired number of balloons with helium and hydrogen. Attach ~6ft. string to each. Tape the ends of the strings to the floor or to the lecture table at such a height ...