A flute may be thought of as a pipe open at both ends. When all the holes of a well-designed flute are covered and the temperature is 20.0°C, it will produce sound with a frequency of 261.6 Hz (middle C). The speed of sound in air at 20.0°C is 343 m/s. (a) Find the length of the flute (in m), assuming middle C is the fundamental. m (b) When an identical flute is played at the same time and in the same manner (all holes covered) in a nearby cold room, a beat frequency of 5.49 Hz is heard. Determine the temperature in the cold room (in °C). °℃

On a warm summer day (33 ∘C), it takes 4.90 s for an echo to return from a cliff across a lake. On a winter day, it takes 5.30 s . The speed of sound in air is v≈(331+0.60T)m/s, where T is the temperature in ∘C. What is the temperature on the winter day?

The relationship between the number of decibles B and the intensity I in watts per square meteris denoted by the equation B = 10log(10^12 x I). If the intensity of a given sound is increased by a factor of 100, by how much does the number of decibels increase?

(a) Find the length (in m) of an organ pipe closed at one end that produces a fundamental frequency of 262 Hz when air temperature is 18.0°C. m (b) What is its fundamental frequency (in Hz) at 28.0°C? Hz

the fundamental frequency of a system is 375hz. if the system is a cylindrical pipe with one end open and one closed end, give the lowest frequency a standing wave can occur (excluding the fundamental).

The speed of sound in air is 331 m/s at atmospheric pressure and 0 Celsius.  Suppose you put a electronic pinger in an air-tight glass jar and change the pressure  of the air inside by a factor  1.3,  while the volume, composition and temperature of the air remain the same.  What speed would you measure for the sound  inside the jar? Give your answer in m/s.

A pipe that is open at both ends has a fundamental frequency of 311 Hz when the speed of sound in air is 346 m/s. (a) What is the length of the pipe? m(b) What are the next two harmonics? 1st Harmonic =  Hz 2nd Harmonic =  Hz

(a) If two sound waves, one in a gas medium and one in a liquid medium, are equal in intensity, what is the ratio of the pressure amplitude of the wave in the liquid to that of the wave in the gas? Assume that the density of the gas is 1.81 kg/m and the density of the liquid is 997 kg/m3. The speed of sound is 319 m/s in the gas medium and 1180 m/s in the liquid. (b) If the pressure amplitudes are equal instead, what is the ratio of the intensities of the waves (of the one in the liquid to that in the gas)? (a) Number Units Units (b) Number

A person standing 1.20 m from a portable speaker hears its sound at an intensity of 5.10 ✕ 10−3 W/m2. HINT (a) Find the corresponding decibel level.  ?dB (b) Find the sound intensity (in W/m2) at a distance of 39.0 m, assuming the sound propagates as a spherical wave.  ?W/m2 (c) Find the decibel level at a distance of 39.0 m.  ?dB

4.  (a) What should be the length of an organ pipe, closed at one end, if the fundamental frequency is to be  257.9 Hz? (Assume a temperature of 20°C.) Round final answers to the third digit. in cm  (b) What is the fundamental frequency of the organ pipe of part (a) if the temperature drops to −5.000°C? in Hz