Elasticity-Old is Gold Content

    Elasticity-Old is Gold

    1. A rigid, lighter than air balloonfilled with Helium cannot continue to rise indefinitely. Why?
    2. Why bridges are declared unsafeafter a long use?
    3. Explain which one is more elastic-rubber or steel.
    4. Why are rubbers used as vibration absorbers?
    5. Differentiate between elasticity and plasticity.
    6. Two wires A and B have equal lengths and are made of same material. If the diameter of wire A is twice that of wire B, which wire has the greater extension for a given load?
    7. Explain in terms of breaking stress, why elephant has thicker legs as compared to human beings?