(a)[1]
State the speed of sound in air and say how the speed of sound in water compares with that in air.
(b)[2]
State and explain whether humans with normal hearing can hear every sound the dolphin emits.
(c)[2]
Complete Table 5.1 by describing how the loudness and pitch differ for the two dolphin sounds.
(d)[3]
Complete the sentences to describe how sound is passed through water. Sound waves are made of vibrating [BLANK] and these create compressions and rarefactions. A compression is a region of [BLANK] and a rarefaction is a region of [BLANK]. The sound waves travel [BLANK] to the direction of the vibrations.