Question

1(1). When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire
room. Give reason
(11). In a beam of sunlight entering a room, we can see sometimes dust particles moving in a
haphazard way in the air. Why do these dust particle move
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Answer 1

Explanation:

When an incense stick is lighted in one corner of a room, its fragrance spreads in the whole roon quickly because the particles were mixes with the space present in the air and as the air moves the particles also move and room is full of fragrance.

When a beam of sunlight enters a room, suspended dust particles are seen moving haphazardly. This is because the dust particles are constantly hit by the fast moving particles of air and due to this remain suspended despite gravity acting on them. This is an example of Brownian motion.

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Answer 2

Answer:

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Explanation:

When an incense stick is lighted in one corner of a room, its fragrance spreads in the whole roon quickly because the particles were mixes with the space present in the air and as the air moves the particles also move and room is full of fragrance

Solution. When a beam of sunlight enters a room, suspended dust particles are seen moving haphazardly. This is because the dust particles are constantly hit by the fast moving particles of air and due to this remain suspended despite gravity acting on them. This is an example of Brownian motion.