Final answer:
In order to calculate the number of balloons needed to float, you would need to know the weight of each balloon and the weight of the gas inside each balloon. Then, divide the total weight of the objects that need to be lifted by the weight of each balloon to determine the number of balloons needed.
Step-by-step explanation:
In order to calculate the number of balloons needed to float, you would need to know the weight of each balloon and the weight of the gas inside each balloon. This information is necessary because the buoyant force acting on the balloon, which allows it to float, is equal to the weight of the gas inside the balloon minus the weight of the balloon itself.
To calculate the number of balloons needed, you would divide the total weight of the objects that need to be lifted by the weight of each balloon. This would give you the number of balloons needed to generate enough buoyant force to lift the objects.
For example, if the total weight of the objects is 1000 grams and each balloon can lift 10 grams, you would need 100 balloons to float.