Question

Give reasons i) Roofs of a hut get blown off during a storm.

ii) A sky lantern rises up.​

Answer 1

Explanation:

i)The pressure below the roof is equal to the atmospheric pressure which is now larger than pressure above the roof. This difference of pressure causes an upward thrust and the roof is lifted up. Once the roof is lifted up, it is blown off with the wind along its direction

ii)They consist of a paper shell stretched over a frame, with a candle inside. When lit, the flame heats the air inside the lantern, causing the lantern to rise into the air like a hot air balloon

Answer 2

Answer:

(i) The pressure below the roof is equal to the atmospheric pressure which is now larger than pressure above the roof. This difference of pressure causes an upward thrust and the roof is lifted up. Once the roof is lifted up, it is blown off with the wind along its direction.

(ii)Fire generates hot air, which is lighter than the cold air, and it lifts the lantern. It originated in the Asia where is traditionally used in festivals or for play. ... In Thailand, on a very important festival Yi Peng, people release many sky lanterns because they believe it will bring them good luck.

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