Science Practical 09 – Viva Questions

Science Practical 09 – Viva Questions

Physics

Verification of the Laws of Reflection of Sound

1. What are the laws of reflection of sound?
2. How does sound reflection differ from light reflection?
3. Why is a hard surface required for sound reflection?
4. What happens if the reflecting surface is rough?
5. Give some real-life applications of the reflection of sound.

Density determination of a solid using a spring balance and measuring cylinder

1. Define density. What is its SI unit?
2. Why do we use the water displacement method for volume measurement?
3. How does temperature affect the density of a substance?
4. What are the factors affecting the accuracy of this experiment?
5. Can this method be used for all types of solids? Why or why not?

Relation between loss in weight of solids in water (tap water vs. salty water).

1. State Archimedes’ principle.
2. Why does an object feel lighter in water than in air?
3. How does the density of a liquid affect the buoyant force?
4. Why does salty water exert more buoyant force than tap water?
5. Can this method be used to determine the density of an irregular solid? Explain.

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Based on NCERT Manual