21.
Short answer type questions [3 marks]
Use the diagram of a wave below to answer the
questions that follow
(a) What kind of wave is this?
b) Label the compressions and rarefactions.
le How do vibrations make these kind of waves?
22. In the following graph, the displacements of a
particle of a progrssive wave at different times are
shown. Refer to this graph and answer the questions
given below.
10 +
Distance (m)
10.25
0.50
0/75
1.00
1.25
1.50
-5-
-10
Time (s)
(a) What is the amplitude of the wave?
(b) What is the period of vibration of the particle?
of the wave?
Answers
Answer:
1-A wave is a continuous and repeating disturbance of a medium and a pulse is a single disturbance.
2-In longitudinal waves, particles of the medium vibrate to and from in a direction parallel to the direction of energy transport. If energy is transmitted along a medium from the east end to the west end, then particles of the medium would vibrate eastward and westward
A sound wave is a longitudinal wave but not the answer since a wave which exhibits this characteristic is not necessarily a sound wave.
3-In transverse waves, particles of the medium vibrate to and from in a direction perpendicular to the direction of energy transport.
4-In transverse waves, particles of the medium vibrate to and from in a direction perpendicular to the direction of energy transport. In this case, that would be parallel to the line AD.