Which is heavier a hot air filled balloon or a cold air one?

A balloon filled with cold air weighs more

Explanation:

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!