Exam 14: Waves and Sound

Two taut strings of identical mass and length are stretched with their ends fixed,but the tension in one string is 1.10 times greater than in the other.Waves on the string with the lower tension propagate at 35.2 m/s.The fundamental frequency of that string is 258 Hz.What is the beat frequency when each string is vibrating at its fundamental frequency?

Suppose that a sound source is emitting waves uniformly in all directions.If you move to a point twice as far away from the source,the frequency of the sound will be

You are driving along a highway at 25.0 m/s when you hear the siren of an emergency vehicle traveling at constant speed in the opposite direction on the other side of the highway.When the vehicle is approaching you,you hear the frequency of the siren as 2380 Hz,but when it is past you the frequency becomes 1680 Hz.What is the frequency of the siren? The speed of sound in air is 343 m/s.

What is the frequency of a pressure wave of wavelength 2.5 m that is traveling at 1400 m/s?

Two loudspeakers placed 6.00 m apart are driven in phase by an audio oscillator having a frequency range from 1908 Hz to 2471 Hz.A point P is located 4.70 m from one loudspeaker and 3.60 m from the other speaker.At what frequency of the oscillator does the sound reaching point P interfere constructively? The speed of sound is 344 m/s.

A bat emits a sound at a frequency of 39.0 kHz as it approaches a wall.The bat detects beats with a frequency of 827 Hz between the sound it emits and the echo bouncing from the wall.What is the speed of the bat if the speed of sound in air is 343 m/s?

You are driving along a highway at 25 m/s when you hear the siren of an emergency vehicle traveling at constant speed in the opposite direction on the other side of the highway.When the vehicle is approaching you,you hear the frequency of the siren as 2380 Hz,but when it is past you the frequency becomes 1680 Hz.What is the speed of the vehicle? The speed of sound in air is 343 m/s.

A 10-gram wire that is 6.0 m long is under tension.When a transverse wave of frequency 280 Hz travels along the wire,its wavelength is 0.60 m,and its amplitude is 8.4 mm.How much time does it take for a crest of the transverse wave to travel the length of the wire?

A crane lifts a 2500-kg beam using a steel cable whose mass per unit length is 0.650 kg/m.What is the speed of transverse waves on this cable if the upward acceleration of the beam is a steady 3.00 m/s²?

Find the first three harmonics of a string of linear mass density 2.00 g/m and length 0.600 m when the tension in it is 50.0 N.

One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz,and the next higher harmonic has a frequency of 576 Hz.How long is the tube? The speed of sound in air is 343 m/s.

What is the wavelength of the wave shown in the figure?

A tsunami,an ocean wave generated by an earthquake,propagates along the open ocean at 700 km/hr and has a wavelength of 750 km.What is the frequency of the waves in such a tsunami?

In a resonating pipe that is open at one end and closed at the other,there

Two steel wires are stretched with the same tension.The first wire has a diameter of 0.610 mm and the second wire has a diameter of 0.910 mm.If the speed of waves traveling along the first wire is 54.0 m/s,what is the speed of waves traveling along the second wire?

Four waves are described by the following equations,where distances are measured in meters and times in seconds. I.y = 0.12 cos(3x - 21t) II.y = 0.15 sin(6x + 42t) III.y = 0.13 cos(6x + 21t) IV.y = -0.23 sin(3x - 42t) Which of these waves have the same speed?

When a guitar is tuned to adjust it pitch,what is it that is changed?

Two stereo speakers mounted 4.52 m apart on a wall emit identical sound waves.You are standing at the opposite wall of the room at a point directly between the two speakers.You walk 2.11 m parallel to the wall,to a location where you first notice that the sound intensity is essentially zero.If the wall along which you are walking is From the wall with the speakers,what is the wavelength of the sound waves? The walls are cushioned to absorb sound reflections.

The intensity of the waves from a point source at a distance d from the source is I.What is the intensity at a distance 2d from the source?

Two motors in a factory are running at slightly different rates.One runs at 825.0 rpm and the other at You hear the sound intensity increase and then decrease periodically due to wave interference.How long does it take between successive instances of the sound intensity increasing?