Fig. 9.1 illustrates the position of a man working in a rock quarry. One explosion is used to shatter part of a rock face. The labels shown are: front rock face, back rock face, explosion, man. The explosion is 430 m from the man, and the man is 170 m from the back rock face.
(a)[1]
Explain why the man sees the flash from the explosion before he hears the bang.
(b(i))[1]
State what this second bang is called.
(b(ii))[2]
State how the second bang compares with the first bang in terms of amplitude and speed.
(c)[3]
Use the information in Fig. 9.1 to determine the speed of sound in the quarry.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “light moves faster than sound (or converse argument)” …