Q1:- Why does a balloon filled with hydrogen rise in air?
Ans:- As the weight of the balloon is less than the weight of air displaced by it therefore the balloon rises in air. In balloons hydrogen is normally filled because it is lighter than air.
Q2:- Why does smoke curl up in the air?
Ans:- This is another case of lighter weight. Smoke contains hot gases which are lighter in weight , follow a curved path because of the eddy currents that are set up in the air.
Q3:- Why does an electric bulb explode when it is broken? Continue reading “Why does a balloon filled with hydrogen rise in air?”