A and B, who are two students, measure the speed of sound. They stand next to each other, 520 m from a wall, as illustrated in Fig. 7.1. Student A produces a loud sound by striking two blocks of wood together once. After a short delay, both students hear the sound bounced back from the wall.
(a(i))[1]
State the name given to the reflected sound.
(a(ii))[3]
Table 7.1 shows the properties of a sound wave. Compare the original sound with the reflected sound. Put a tick (✓) in the appropriate column for each property. The first one has already been completed.
(b(i))[1]
Suggest a suitable instrument for measuring the interval between hearing the original sound and hearing the reflected sound.
(b(ii))[3]
Using the information in Fig. 7.1, calculate the speed of sound.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “echo” …