CamScanner 09-09-2021 14.46KERCISE 4.4 ON SOUNDniess otherwise stated take the speed of sound in air to be 340 m.s.You hear a thunderclap 5 s after you see the lightning flash. How many kilometres away is thethunder storm?A longitudinal wave has a wavelength of 2,5 m and travels in air.What is meant by the term 'wavelength' in the context of a longitudinal wave?Calculate the frequency of the wave.Calculate how far a compression will travel in I minute.2.12.22.3A tuning fork is marked at 256 Hz. Calculate the wavelength of the sound wave it produces inair.Echo sounders are instruments that transmit sound pulses that reflect off the seabed. From thetime it takes for the pulse to retum to the instrument, the distance travelled by the sound, andtherefore the depth of the sea, can be calculated. The speed of sound in seawater is 1 480 m.s.The echo sounder of a ship receives the echo of a pulse 0,4 s after it was transmitted.4.1 Calculate the distance travelled by the sound.4.2What is the depth of the sea below the hull of the ship?A ship anchored in a harbour is 500 m from a vertical cliff face. The ship siren is sounded andthe echo is heard after 3 s.Calculate the speed of sound in the air at that particular time.If the frequency of the siren is 250 Hz, calculate the wavelength of the sound wave itproduced.5.15.2Bats emit ultrasound waves of very high frequency. These sound waves bounce off objects thatare in the path of the bat. From the echo received the bat can avoid colliding with these objects.If the frequency of the sound emitted by the bats is 120 000 Hz, calculate6.1 the wavelength, in air, of the sound waves produced by the bats (give your answer inmm);the distance of an obstacle from a bat, if the bat receives an echo after 0,4 s.6.2During an athletics meeting, a time keeper starts her stop watch when she hears the starter'spistol instead of when she sees the smoke. If she is 200 m from the starter's pistol, calculate theerror in her recorded time.18:181/1O

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Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter14: Superposition And Standing Waves

Section: Chapter Questions

Problem 8CQ

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The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. The sound level of this creature has been measured as high as 100. dB. (a) Calculate the intensity of the sound wave emitted. (b) What is the intensity level if three of these toadfish try to make a sound at the same time?
A hammer strikes one end of a thick iron rail of length 8.50 m. A microphone located at the opposite end of the rail delects two pulses of sound, one that travels through the air and a longitudinal wave that travels through the rail, (a) Which pulse reaches the microphone first? (b) Find the separation in time between the arrivals of the two pulses.
Which of the following statements is not necessarily true regarding mechanical waves? (a) They are formed by some source of disturbance. (b) They are sinusoidal in nature. (c) They carry energy. (d) They require a medium through which to propagate. (e) The wave speed depends on the properties of the medium in which they travel.
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Show mat the speed of sound in 20.0°C air is 343 m/s, as claimed in the text.
Stems in the South Pacific can create waves that travel all the way to the California coast, which are 12.000 km away. How long does it take them it they travel at 15.0m/s ?
. A sound pulse emitted underwater reflects off a school of fish and is detected at the same place 0.01 s later (Figure 6.54). How far away are the fish
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. The sound level of this creature has been measured as high as 100. dB. (a) Calculate the intensity of the sound wave emitted. (b) What is the intensity level if three of these toadfish try to make a sound at the same time?
What is the wavelength of the waves you create in a swimming pool if you splash your hand at a rate of 2.00 Hz and the waves propagate at 0.800m/s ?
A bullet is fired and moves at a speed of 1342 mph. Assume the speed of sound is v=340.00 m/s. What is the angle of the shock wave produced?
A wave pulse travels to the left on a rope as shown in Figure 18.9. Draw a sketch of the reflected pulse if the left end is a. fixed. b. free. FIGURE 18.9
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siess otherwise stated take the speed of sound in air to be 340 m.s". You hear a thunderciap 5 s after you see the lightning flash. How many kilometres away is the thunder storm?