Minihoudini said:a) a light balloon is filled with 400m^3 of helium at 0 degree C, the balloon can lift a payload of what mass?
A helium balloon payload is a package or equipment that is carried by a helium balloon and is used for scientific experiments, weather forecasting, or other purposes.
A helium balloon payload is launched by filling the balloon with helium gas, attaching the payload to the balloon, and releasing it into the atmosphere. The balloon will rise due to the helium gas's buoyancy and carry the payload to high altitudes.
A helium balloon payload can be used to conduct various experiments such as atmospheric studies, measuring air pollution levels, collecting air samples, studying the Earth's magnetic field, testing new technologies, and more.
A helium balloon payload can reach heights of up to 100,000 feet or more, depending on the size of the balloon and the amount of helium gas used. This allows for experiments to be conducted in the stratosphere, which is the second layer of the Earth's atmosphere.
The duration that a helium balloon payload stays in the air depends on various factors such as the size of the balloon, the amount of helium gas used, and weather conditions. On average, a helium balloon payload can stay in the air for a few hours to a day before it deflates and returns to the ground.