The weight of a balloon is `W_1` when empty and `W_2` when filled with air. Both are weighed in air by the same sensitive spring balance and under identical conditions.

Options

A. `W_1 = W_2`, as the weight of air in the balloon is offset by the force of buoyancy on it.
B. `W_2 lt W_1` due to the force of buoyancy acting on the filled balloon.
C. `W_2 gt W_1`, as the air inside is at a greater pressure and hence has greater density than the air outside.
D. `W_2 = W_1 +` weight if the air inside it.

Answer

C