Exam 12: Sound

A 30.0 cm long organ pipe is filled with air and is open at one end and closed at the other.The velocity of sound in air at 0 $^{\circ}$ C is 331 m/s.What is the wavelength of the fifth mode?

A 20.0 cm long organ pipe is filled with air and is open at one end and closed at the other.The velocity of sound in air at 0 $^{\circ}$ C is 331 m/s.What is the frequency of the fundamental mode?

An organ pipe is 60.0 cm long and is open at one end and closed at the other.The frequency of the third mode is 300 Hz higher than the frequency of the second mode.What is the velocity of sound?

There are two identical organs with pipes having fundamental frequencies of 264.0 Hz at 20 $^{\circ}$ C.One organ is located at the front of the auditorium where the temperature is 20 $^{\circ}$ C and one at the back where the temperature in 25.0 $^{\circ}$ C.What is the beat frequency when the two organs sound this note simultaneously?

The three lowest resonate frequencies of a system are 50 Hz,150 Hz,and 250 Hz.The system could be

Compared to the speed of a 400 Hz sound,the speed of a 200 Hz sound through air is

A block holding a ringing tuning fork oscillates back and forth,attached to a wall by a spring of spring on a horizontal,frictionless surface,with amplitude 17 cm.The mass of the tuning fork and block together is 0.75 kg.An observer who is situated so that the block's direction of motion is either directly towards or away from him notes that the frequency he hears varies between 174 and 178 Hz.What is the period of motion of the block? The speed of sound at the time of the experiment is 340 m/s.

A sound wave in brass has a displacement amplitude of 3.00 mm.The frequency of the sound wave 750 Hz and the velocity is 2,813 m/s.If the density of brass is 8.47 $\times$ 10³ kg/m³,then what is the pressure amplitude of the sound wave?

The speed of sound in air at 0 $^{\circ}$ C is 331 m/s.What is the velocity of sound in air at a temperature of -30 $^{\circ}$ C?

A sound wave in water has an intensity of 1.00 $\times$ 10^-3 Watts/m².The density of water is 1,000 kg/m³ and the velocity of sound in water is 1,482 m/s.The pressure amplitude of the sound wave is

An ambulance is generating a siren sound at a frequency of 2,400 Hz.The velocity of sound is 345.0 m/s.If the ambulance is traveling at a velocity of 24.00 m/s toward the stationary observer,then what is the frequency of the siren perceived by the observer?

A 60.0 cm long brass rod is suspended at the ends by long strings.The rod is struck at one end parallel to the rod and causes the rod to vibrate longitudinally with the ends free.(Y = 9.00 $\times$ 10¹⁰ N/m², S = 3.50 $\times$ 10¹⁰ N/m², B = 6.70 $\times$ 10¹⁰ N/m²,density = 8,470 kg/m³)The frequency of the vibration is

Two organ pipes are meant to be the same length,but apparently they are not.When played simultaneously the beat frequency heard is 2.4 Hz.If the fundamental frequency of the first pipe is 228 Hz,by what fraction is the first pipe different in length than the second?

A 50 cm long organ pipe is filled with air and is open at both ends.The velocity of sound in air at 0 $^{\circ}$ C is 331 m/s.What is the wavelength of the second mode?

A string with a mass per length of 2.00 gm/m is stretched with a force of 150 N between two points that are 0.500 m apart.The fundamental frequency of the stretched string is in tune with the fundamental frequency of an organ pipe filled with air and open at both ends.The velocity of sound in air at 0 $^{\circ}$ C is 331 m/s.What is the length of the organ pipe?

An ambulance is generating a siren sound at a frequency of 2,000 Hz.The velocity of sound is 345.0 m/s.The observer and the ambulance are traveling toward each other at a velocity of 24.00 m/s.If the ambulance is stationary,what is the frequency of the siren perceived by the observer?

The speed of sound in air at 0 $^{\circ}$ C is 331 m/s.What is the velocity of sound in air at a temperature of 30 $^{\circ}$ C?

If on a given day the speed of sound increases by 5% between 8:00 am and 11:00 am,and if the temperature at 8:00 am was 21 $^{\circ}$ C,what was the temperature at 11:00 am?

A guitar string is played together with a tuning fork whose frequency is 256 Hz,and beats of 2 Hz are heard.In such a case,if initially the tension in the string is 150 N,what must the new tension be,assuming the guitar string is initially higher in frequency than the tuning fork?

A block holding a ringing tuning fork oscillates back and forth,attached to a wall by a spring of spring on a horizontal,frictionless surface,with amplitude 17 cm.The spring constant is 390 N/m.An observer who is situated so that the block's direction of motion is either directly towards or away from him notes that the frequency he hears varies between 174 and 178 Hz.What is the mass of the tuning fork and block together? The speed of sound at the time of the experiment is 340 m/s.