wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

(a) Why does hot air rise up?
(b) How does a hot-air balloon work? [3 MARKS]

Open in App
Solution

(a) Reason: 1 Mark
(b) Working: 2 Marks


(a) Hot air rises up because, it has lesser density than the cooler air around it.


(b) A hot-air balloon works on the principle that hot air rises up.

It consists of a burner and a balloon envelope. When the burner is lit, it heats the air around it.

The hot air rises up and the cold air on the sides comes near the burner. The same process continues for a long time.

The hot air gets trapped in the balloon and the hot air balloon rises, depending on the amount of hot air in it..


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon