Physics Waves And Oscillations Level: High School
Sound
A bell is ringing inside of sealed glass jar that is connected to a vacuum pump . Initially , the jar is filled with air . What does one hear as the air is slowly removed from the jar by the pump ?a) The sound is intensity gradually decreases
b) The frequency of the sound gradually increase
c) The frequency of the sound gradually decrease
d) The speed of the sound gradually increase
e) The sound intensity of the bell does not change
Physics Waves And Oscillations Level: High School
Wave in a Stretched String
A certain string on a piano is turned to produce middle C (f = 261.63 Hz) by carefully adjusting the tension is the string . For a fixed wavelength , what is the frequency when this tension is doubled ?a) 130.08 Hz
b) 185.00 Hz
c) 370.00 Hz
d) 446.63 Hz
e) 523.26 Hz
Physics Waves And Oscillations Level: High School
Wave Length
A wave has a frequency of 58 Hz and a speed of 31 m/s . What is the wavelength of this wave ?a) 1.9 m
b) 3.5 m
c) 0.29 m
d) 0.53 m
e) 31 m
Physics Waves And Oscillations Level: High School
Wave Length
The speed of sound in a certain metal block is 3.00 x 10^3 m/s . The graph at “click here” shows the amplitude (in meters) of a wave traveling through the block versus time (in milliseconds). What is the wavelength of this wave ?a) 0.05
b) 1.5 m
c) 3.0 m
d) 4.0 m
e) 60 m
Physics Waves And Oscillations Level: High School
Super Position of Waves
Two harmonic waves are described byy1 = 6 sin[n (2x+3 t)] cm
y2 = 6 sin[n (2x-3t-2)] cm Determine the smallest value of x (in cm) corresponding to a node .
Physics Waves And Oscillations Level: High School
Super Position of Waves
Two harmonic waves are directed byy1 = 3 sin (4x-700 t) m
y2 = 3 sin (4x-700t-2) m
Physics Waves And Oscillations Level: High School
Reflection of Sound
A workman strikes a steel pipeline with a hammer , generating both longitudinal and transverse waves . Reflecting waves return 2.4 s apart . How far away is the reflection point ? (For steel , vL = 6.2 km/s , vr = 3.2 km/s]
Physics Waves And Oscillations Level: High School
Doppler Effect
A truck moving at 36 m/s passes a police car moving 45 m/s headed in the opposite direction . If the frequency of the siren relative to the police car is 500 Hz , what is the frequency heard by an observer in the truck as the police car approaches the truck ? (The truck speed of sound in air is 343 m/s . )
Physics Waves And Oscillations Level: High School
Intensity of Sound
The point source emits sound waves with a power output of 100 watts . What is the intensity (in W/m^2) at a distance of 10 m ?
Physics Waves And Oscillations Level: High School
Sound
Calculate the pressure amplitude (in N/m^2) of a 500 Hz sound wave in helium if the displacement amplitude is equal to 5 x 10^-8 m ,(p = 0.179 kg/m^3 , v = 972 m/s . )
Physics Waves And Oscillations Level: High School
Speed of Sound
It is possible to hear an approaching train before you see it by listening to the sound wave through the track . If the elastic modulus is 2.0 x 10^11 N/m^2 and the density of steel is 7.8 x 10^3 kg/m^3 , approximately how many times faster is the speed of sound in the track than in air ?
Physics Waves And Oscillations Level: High School
Speed of Sound
A piano wire of length 1.5 m vibrates such that one-half wavelength is contained on the string . If the frequency of vibration is 65 Hz , the amplitude of vibration is 3 mm , and the density is 15 g/m , what is the energy transmitted per second down the wire ?
Physics Waves And Oscillations Level: High School
Speed of Sound
To lowest A on a piano has a frequency of 27.5 Hz . If the tension in the 2-m string is 308 N , and one-half wavelength occupies the string , what is the mass of the wire ?
Physics Waves And Oscillations Level: High School
Speed of Sound
A 100-m long transmission cable is suspended between two towers If the mass density is 2 kg/m and the tension in the cable is 3 x 10^4N , What is the speed of transverse waves on the cable ?
Physics Waves And Oscillations Level: High School
Sound Level Intensity
A family ice show is held at an enclosed arena . The skaters perform to music playing at a level of 80.0 dB . This intensity level is too loud for your baby , who yells at 75.0 dB .A) What total sound intensity engulfs you ?
B) What is the combined sound level ?
