Waves questions | form four Physics

Identify three characteristics of sound which distinguish one note from another. Hence
state the physical factors which correspondingly define the mentioned characteristics.

A resonance tube whose one end is closed and the other open, resonates to a note of
frequency 560 Hz when the length of the air column is 15 cm.
Determine the wavelength of this sound in air. What is the shortest length of the air
column which resonates in similar conditions to a note of frequency 1000 Hz.

Figure 1 shows a pattern of waves in a ripple tank traveling from part X to part Y across a plane section Z.

What observation can be made from Figure 1?
A the total reflection occurs at Z
B the wavelength in part X is greater than that in part Y
C the wave speed v1 in part X is less than v2 in part Y
D diffraction occurs across Z
E The wave changes in frequency as it crosses Z.

Light waves differ from sound waves because
A light is an electromagnetic wave but sound is a mechanical wave.
B sound waves do not travel in water but light waves do.
C the speed of light is independent of the medium it travels but the speed of sound
depends on the medium.
D interference is obtained with light waves but not with sound waves.
E the speed of sound waves is greater than that of light waves in the same medium.

A basic condition for diffraction of a wave when it passes through an opening is that
A the wavelength of the incident wave must be greater than the size of the opening.
B the amplitude of the wave must be smaller than the size of the opening.
C the wavelength of the wave must be shorter than the corresponding size of the
opening.
D the wavelength of the wave must almost be equal to the size of the opening.
E the amplitude of the wave must be greater than the opening.

A regular rise and fall in loudness of a music played at a distance is called
A intensity
B timbre
C pitch
D beats
E resonance

(i) List four behaviours of waves.
(ii) Give two applications of each behaviour listed in  (i).

(i) Differentiate echoes from reverberations.
(ii) Why is it important to use sound absorbers in larger buildings?

Which of the following statements is true about musical interval?
A is the sum of two frequencies
B is the difference between two frequencies
C is the ratio of two frequencies
D is a multiple of the fundamental frequency
E has high frequency at shorter wavelength.

The human ear can respond frequencies of sound in the range of
A 2kHz to 100kHz B 20kHz to 5000kHz
C 100Hz to 1000kHz D 20Hz to 20kHz
E 10Hz to 100kHz