it will float better in winter
Hydrogen is lighter than helium. So hydrogen balloon will float better than helium.
a balloon float on water
Yes, it will It's actually better to use nitrogen in balloons because it floats better than helium.
Hot air. That's what makes it float.
Fill a balloon part way with helium, make an animal out of it and have it float.
The key word there is float. There is nothing in space for a hot air balloon to float on.
yes
Heilum combined with the light material of the balloon make it as light as air making it float.
Helium goes into a balloon to make it float.
The balloon will either float or pop
because helium has less density
Hot air rises and the fire in the hot air balloon wants to go up and float in the air and since it's can't escape the balloon the fire just brings the balloon with it to float in the air