The speed of sound varies from one material to another.
(i) Define the term “speed of sound” in a medium and name any two factors of the medium on which it depends.
(ii) Three uniform rods made of rubber, aluminium and iron are struck one after another. Without using any numerical data, arrange the three rods in the order in which sound will travel through them from fastest to slowest.
(iii) Give a detailed qualitative explanation for your answer in part (ii) on the basis of the factors stated in part (i).