10 - The whistle of a factory is sounding with a frequency of 700 Hz. (a) What frequency will be heard by a worker approaching the factory on her bike at 20 km/h? (b) What frequency will be heard by another work walking away from the factory with 4 km/h? Assume the speed of sound to be 343 m/s.

Q: 40. Find the wavelength in air of an 26-Hz sound wave at 417 m/s, which is one of the lowest…

A: f= 26 Hz  V= 417 m/s

Q: A bullet can travel at a speed of over 1000 m/s. When a bullet is fired from a rifle, the actual…

A: Here bullet can travel at a speed of over 1000 m/s, then it will create a shock wave, because the…

Q: 8. The distance between the 3rd and 7h node of a standing wave is 75cm. Find the speed of the waves…

A:

Q: A baseball hits a car, breaking its window and triggering its alarm which sounds at a frequency of…

A:

Q: 5) A Stationary wave of 10 loops is set up in a rope 10 m long. Calculate the wavelength of the…

A: Given : No. of loops (N) = 10 Length of rope (L) = 10 m

Q: 15. A tuning fork is vibrating along with a sonometer wire. 5 beats per second are heard when the…

A:

Q: 23. Two sounds are measured for their loudness in decibels. The crowd at a packer game produces a…

A: Given, oo Sound intensity of crowd = 130 dB  Sound intensity of lawnmower = 90 dB  The relationship…

Q: 446. A 16-16 wire cable 100 ft. long is stretched between two poles under tension of 500 lb. If the…

A: We have a 16-16 wire  Length , L =100 ft Tension , T = 500 lb To find = Time

Q: 10. When a sound wave hits a solid surface, some of the energy is and some of it is reflected.

A: A wave is a propagating disturbance which have energy without any net moment of its particles from…

Q: 19. Which of the following differentiates progressive waves from standing waves? - Propagation of…

A:

Q: A car travelling south at 36 m/s sounds a 456 Hz horn. What frequency is heard by the driver if he…

A: speed of car = 36 m/s frequency of horn (f) = 456 Hz speed of another car = 25 m/s Speed of sound in…

Q: 18. The color orange within the visible light spectrum has a wavelength of about 620 nanometers or…

A: 18. Given: The wavelength is 620x109 m. The speed of light is 3x108 m/s.

Q: (8) Earthquakes are essentially sound waves travelling through the earth. They are called seismic…

A: Given that:vp=8228.0 m/svs=5482.0 m/s∆t=2.16 min=129.6 s

Q: 6. A train approaching a crossing sounds its horn with a frequency of 750 Hz. An observer standing…

A:

Q: 4. A bat is using echolocation to find insects at night. If the bat emits a high frequency chirp and…

A:

Q: For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of…

A:

Q: 11. If 1 bug makes a sound of 8 dB then what will 25 bugs sound like?

A: 11) Given, Sound intensity level of 1 bug is 8dB.

Q: 13. The warning tag on a lawn mower states that it produces noise at a level of 91.0 dB. What is…

A: Given data

Q: 6. What is the length of brass pipe if you measure a sound wave to take .5 s to travel the length of…

A: Time taken to travel through length ,"t"= 0.5s. now , speed of sound in brass is "v"= 4300m/s .…

Q: Question 7 A metal wire is arranged vertically with its upper end held fixed in a support. A load of…

A: Sound is longitudinal wave and hence it needs material medium to travel. The speed of sound in…

Q: 5. Calculate the frequency of a musical note when the speed of sound is 344 m/s and the second…

A: Given Speed of sound = 344 m/s Second resonant length of an open air column= L = 50.0 cm = 0.50 m We…

Q: 103. •Biology The area of a typical eardrum is 5.0 x 10-5 m². Find the sound power incident on an…

A:

Q: Transverse waves travel with a speed of 10 m/s on a string under a tension of 8 N. What tension is…

A:

Q: Dolphins make sounds in air and water. What is the ratio of the wavelength of a sound in seawater to…

A: Given data: Speed of sound in sea water, vs=1548 m/s Speed of air at 0 OC, vo=331 m/s Speed of air…

Q: 55. What is the ratio of the intensity of a given sound to that of one that is 100 decibels higher?

A: Write the formula for the sound intensity level in dB.

Q: 6. A train approaching a crossing sounds its horn with a frequency of 750 Hz. An observer standing…

A: Given: The frequency of the train's (the source's) horn: fs = 750 Hz. The frequency of the whistle…

Q: A bat traveling at a speed of 18.1 m/s sends out sound at a frequency of 48.2 kHz, can 'see' objects…

A:

Q: 18. The color orange within the visible light spectrum has a wavelength of about 620 nanometers or…

A: Given, Wavelength, λ=620 nm=620×10-9 m Speed of light, c=3×108 m/s

Q: 8) Ultrasound with a frequency of 4.25 MHz can be used to take pictures in the body. If the speed of…

A: solution as

Q: 25. When would a sonic boom be possible? (source moves speed of sound, source moves at speed of…

A: To solve the given question we will write down the definition of sonic boom, hence by analyzing it…

Q: 2. As it approaches a boy standing on the road, an ambulance traveling at 100 km/hr blows its siren.…

A: Given velocity of the ambulance approaching the boy is vs = 100 km/hr = 27.78 m/s and the frequency…

Q: 6. A shock wave caused by driver gas is called a) Shear front b) Shock front c) Contact front d) Cap…

A: In physical science, a shock wave, or shock, is a sort of proliferating aggravation that moves…

Q: 12. Two trains on separate tracks moves toward each other. Train 1 has moved with a speed of 118…

A:

Q: 46) A point source emits sound with a power output of 100 W. What is the sound level (in dB) at a…

A:

Q: 52. The noise level of a whisper is about 30 decibels, and that of ordinary conversation is around…

A:

Q: 49.) A process called convergence is when two or more waves overlap and combine to form a new wave…

A: When two or more waves overlap and combine to form a new wave, then the process is called…

Q: 9. A vibration of frequency 5 Hz

A: GivenFrequency (f)=5 HzWavelength (λ)=0.8 m

Q: A bat flying toward a wall emits a 49000-Hz sonar pulse. The pulse is reflected back from the wall…

A: Write the relation for observed frequency and emitted frequency

Q: A bat is flitting about in a cave, navigating via ultrasonic bleeps. Assume that the sound emission…

A: GIVEN : sound emission frequency = f = 37.1 kHz velocity of air = v = 343 m/s velocity of the bat…

Q: -96 A listener detects a sound with an intensity of 2. 00 x 10° w/m.If the sound is generated at…

A: Given: The intensity is I=2X10-6 W/m2. The power is P=80 W. The expression for power is:…

Q: 15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its Velocity?

A:

Q: An ocean liner experiences broad waves, called swells, with a frequency of one every 20 seconds…

A: It is given that,

Q: 21. A sound wave travels at 340 meters per second. Determine how far from the source the wave has…

A:

Q: People can hear sounds ranging in frequency from about 24 Hz to 23 kHz . Assume the speed of sound…

A: Write the given values with the suitable variables. v=340 m/sf1=24 Hzf2=23 kHz=23×103 Hz Here, v,…

Q: 76. A bird is fl ying directly toward a stationary bird-watcher and emits afrequency of 1250 Hz. The…

A: Observed frequency of sound is,  f0=v+v0v+vsfs Here,  v=velocity of sound  v0=velocity of observer…

Q: The bat uses its ultrasonic radar instead of sight when flying in the dark. If the bat's own flight…

A:

Q: (12. If 4 bugs make a sound of 14 dB then what will 25 bugs sound like?

A: 12) Given  4 bugs make sound of 14 dB then what will 25 bugs sound like

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.