(a)[3]
Calculate the mean value for the time intervals shown on the stop-watches in Fig. 7.2.
(b(i))[1]
State the name of the instrument used to measure the distance between the teacher and the students.
(b(ii))[3]
Calculate the speed of sound.
Physics 0625 · IGCSE · Sound
Sound — practice question
A class of students is collecting measurements in order to work out the speed of sound. Both the teacher and the students are outside. The teacher is holding two blocks of wood, while the students each have stop-watches. The teacher is positioned far away from the students, as shown in Fig. 7.1. Every student can see the teacher clearly.