Baloon filled with hydrogen gas float in air or rises if the quntity of gas it contain is adjusted so that the average density of the balloon is just eguall to the density of the surrounding air.The weight of the displaces air is then eguall to the weight of the balloon
it rises
As a balloon rises in the air, the volume or size of the balloon increases. This is because the atmospheric pressure decreases as the balloon gains altitude, causing the air inside the balloon to expand and the balloon to inflate.
due to pressure inside the balloon, will be higher because the balloon will try to get smaller and thus the balloon will ascent due to the low density of the helium inside the balloon.
Air inside the balloon is heated. Hot air is less dense than the surrounding air, and thus the balloon rises.
As the helium-filled balloon rises into the atmosphere, the surrounding air pressure decreases while the pressure inside the balloon remains the same. This causes the helium inside the balloon to expand, making the balloon increase in size. Eventually, the balloon will reach a point where the difference in pressure between the inside and outside of the balloon will be equal, and it will float at that altitude.
The pilot blacks out and dies, then comes back as a zombie
When the force acting on a hot air balloon is balanced, the balloon will remain at a constant altitude. This means that the buoyant force on the balloon is equal to the gravitational force acting on it. As a result, the balloon neither rises nor descends.
When you release a balloon, it will rise into the air because the gas inside the balloon is lighter than the air outside. As the balloon rises, it will expand due to the decrease in atmospheric pressure, until it eventually pops or deflates when it reaches a certain altitude.
When David releases the balloon, it will float upward due to the buoyancy of the helium inside. As the balloon rises, it will continue to expand due to the decreasing atmospheric pressure until it reaches its bursting point and pops.
As the balloon rises, the air pressure outside will decrease, and the balloon skin will deform till the pressure on both sides of the skin is the same. Thus your balloon will inflate in shape, towards the spherical, which is the limiting shape for a simple balloon.
As a balloon rises, the pressure inside the balloon decreases. This is because the atmospheric pressure outside the balloon decreases with altitude, causing the balloon to expand as the pressure inside remains relatively constant.
At the end of its flight, a weather balloon typically bursts due to the decreasing air pressure as it rises higher into the atmosphere. The instruments attached to the balloon then parachute back to the ground, where they are retrieved for data analysis.