A weather forecasting plastic balloon of volume `15m^3` contains hydrogen of density `0.09(kg)/(m^3`. The mass of the empty balloon is 7.15kg Calculate (a) the mass of hydrogen in the balloon (b) the mass of the balloon filled with hydrogen.

A weather forcecasting plastic balloon of volume 15m^(3) contains hydrogen of density 0.09kgm^(-3) . The volume of an equipment carried by the balloon is negligible compared to its own volume. The mass of empty balloon alone is 7.15 kg. The balloon is floating in air of density 1.3kgm^(-3) . Calculate (i) the mass of hydrogen in the balloon. (ii) the mass of hydrogen and balloon, (iii) the total mass of hydrogen, balloonand equipment if the mass of equipment is x kg. (iv) the mass of air displaced by balloon and (v) the mass of equipment using the law of floatation.

Two balloons of equal weight and volume are filled with hydrogen gas. One of the balloons is made of rubber while the other is made of incompressible polythene. If hydrogen gas does not leak from either balloon, then which balloon will rise higher?

A balloon of mass m descending with an acceleration a. What mass be dropped from the balloon so that it may go up with the same acceleration a?

A balloon has volume of 1000 m^(3) . It is filled with hydrogen (rho=0.09 gL^(-1)) . If the density of air is 1.29 gL^(-1) , it can lift a total weighht of

A balloon of mass m is rising up with an acceleration a.

A balloon inflated with helium gas (density = 0.2 kg//m^(3) ) has a volume of 6 xx 10^(-3) m^(3) . If the density of air is 1.3 kg//m^(3) . What is the buoyant force exerted on the balloon ?