D. Give reasons for the following.
1. Heat is not considered as matter.
2. The zig-zag irregular motion is seen in suspended particles of fluid.
3. Solids are incompressible. Valse
4. Smell of a perfume reaches to the person sitting in another room.
5. Fluid takes the shape of the container in which it is kept.
Answers
Explanation:
1. Matter has mass and occupies volume. Heat, light, and other forms of electromagnetic energy do not have measurable mass and can't be contained in a volume. Matter can be converted into energy, and vice versa. Matter and energy are often found together.
2.Brownian movement Random, zigzag movement of particles suspended in a fluid (liquid or gas). It is caused by the unequal bombardment of larger particles, from different sides, by the smaller molecules of the fluid.
3.The constituent particles of a solid are very closely packed. The inter-particle distances are so small that if we try to bring them closer, repulsions start between their electron clouds. Hence, they are incompressible .
4.We can get the smell of perfume sitting several metres away due to diffusion. The perfumes contain solvent which carries pleasant smelling vapours. They diffuse quite fast and can reach a person sitting several metres away.
5.because their particles are loosely packed.. and because of that they also less force of attraction which doesn't allow the molecules to remain at their place or their place is not fixed.. that's why liquids take up the shape of the container in which they are kept..