Under the sunlight, the temperature of the hydrogen balloon with the slogan rising increases and the volume expands. The gravitational force on the balloon is ______, and the buoyancy force on the bal

Under the sunlight, the temperature of the hydrogen balloon with the slogan rising increases and the volume expands. The gravitational force on the balloon is ______, and the buoyancy force on the balloon is ______?

∵ As the temperature increases, the volume of the hydrogen balloon expands, but its mass remains unchanged.

∴ From the formula G=mg, it can be seen that the gravity exerted on the balloon Remaining unchanged,

and the density of air remains unchanged, the volume of the hydrogen balloon expands, causing the volume of air displaced to become larger,

∴ According to the formula F float = ρ air gv displaced It can be seen that the buoyancy force on the balloon becomes larger.

So the answer is: unchanged, getting bigger.