A list of mediums is given below.(i) wood (iii) air(ii) water (iv) vacuumIn which of these mediums can sound travel?
Which of the following process / processes release heat ? (i) condensation (ii) vaporisation (iii) freezing (iv) melting
(a) only (i) (b) only (iv) (c) (i) and (iii) (d) (ii) and (iv)