. A meteorological balloon has a volume of 10 cubic meter and the fabric of the balloon weighs 80N.It is filled with hydrogen of density 0.09kilogram per cubic meter and the air density is 1.2kgm3.Estimate the maximum weight additional to that of the hydrogen and fabric which the balloon can lift. ii. How would this figure change if helium, which has twice the density of hydrogen under the same conditions,were to be used?
