A factory siren produces a steady frequency of 1.0kHz. In air, the measured wavelength of the sound is 0.34m, while in water it is 1.48m.
(i) Calculate the speed of sound in air.
(ii) Calculate the speed of sound in water.
(iii) Determine the time taken for the sound to travel 2.0km in air and in water. Give both answers correct to two significant figures.
(iv) Explain briefly why the speeds obtained in parts (i) and (ii) are different.