Question

Q1) Explain:- "when an incense stick in lighted in the corner of a room, it's fragrance spreads quickly in the entire room

Q2) State the two characteristics of matter demonstrated by
a) Diffusion
b) Brownian motion

Q3 Define matter with examples?

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Answer 1

1. Spray perfume in one corner of the room and go to the other corner, after sometime you can smell the perfume in that corner of the room too.

This proves that the particles of matter are continuously moving.

2. Diffusion is the movement of a substance from an area of high concentration to an area of low concentration

Brownian motion is the erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium.

3. Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size. The most familiar examples of material particles are the electron, the proton and the neutron.

Answer 2

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1) When incense stick is lighted in the corner of a room , it's fragrance spreads quickly in the entire room because on heating the kinetic energy increases . Therefore , as the incense stick is lit the particles moves faster in the air as kinetic energy increases on heating .

2) Diffusion: Diffusion is nothing but the movement of molecules from it's higher concentration to loyer concentration. ... Brownian motion tells us that the particles are tiny nature and the particles of a matter are constantly moving.

3) Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size. The most familiar examples of material particles are the electron, the proton and the neutron. Combinations of these particles form atoms.