A longitudinal wave travels through a long spring. The spring is shown at one instant.
What is the wavelength of the wave?
A sound wave has a frequency of 2500 Hz and a speed of 1500 m.s^–1.
What is the shortest distance from a point of maximum pressure in the wave to a point of minimum pressure?
A 0.15 m
B 0.30 m
C 0.60 m
D 1.20 m
A sound wave is displayed on the screen of a cathode-ray oscilloscope (c.r.o.) as shown.
The time-base of the c.r.o. is set at 2.5 ms.cm^–1.
What is the frequency of the sound wave?
A 50 Hz
B 100 Hz
C 200 Hz
D 400 z
The period of an electromagnetic wave is 1.0 ns.
What are the frequency and wavelength of the wave?
Which statement about progressive longitudinal waves is not correct?
A The oscillations of the particles are parallel to the direction of travel of the wave energy.
B They have a series of nodes and antinodes.
C They need a medium through which to travel.
D They transfer energy.
A bicycle gear wheel is a disc with 50 ‘teeth’ equally spaced around its edge, as shown. The gear wheel is rotated 10 times each second. A springy strip of metal is vibrated by the rotating ‘teeth’.
The metal strip produces a sound of frequency that is equal to the frequency of vibration of the strip.
The speed of sound in air is 330 m.s^–1.
What is the wavelength of the emitted sound?
Which row describes the oscillations of two moving particles in a stationary wave that are separated by a distance of half a wavelength?
Two wave sources are oscillating in phase. Each source produces a wave of wavelength λ. The
two waves from the sources meet at point X with a phase difference of 90°.
What is a possible difference in the distances from the two wave sources to point X?
Which statement about electromagnetic waves in a vacuum is correct?
A Amplitude is inversely proportional to velocity.
B Frequency is inversely proportional to wavelength.
C Intensity is proportional to amplitude.
D Velocity is proportional to wavelength.
A transverse wave travels along a rope.
The graph shows the variation of the displacement of the particles in the rope with distance along it at a particular instant.
At which distance along the rope do the particles have maximum upwards velocity?
A 0.5 m
B 1.0 m
C 1.5 m
D 2.0 m