TABLE 12–1 Speed of Sound in Various Materials (20°C and 1 atm) Material Speed (m/s) Air 343 Air (0°C) 331 Helium 1005 Hydrogen 1300 Water 1440 Sea water 1560 Iron and steel 5000 Glass 4500 Aluminum 25100 Hardwood 4000 Concrete 3000

Q: Due to efficiency comsiderations related to its bow wake, the supersonic transport aircraft must…

A: Mach number is given as the ratio of velocity of object to the velocity of sound in medium. As given…

Q: If you saw a lightning at t = 0 and heard the thunder at about t = 5 s. Estimate the distance of the…

A: Given,  Time, t= 5s, speed of sound, vs=343 m/s.

Q: (1) If a after the lightning is seen, how far js the ightning from the man ? (Speed of sound in air…

A:

Q: (II) Two violin strings are tuned to the same frequency, 294 Hz. The tension in one string is then…

A:

Q: ssume that the speed of sound is 343 m/s at 20 degrees C. Also assume that a bat uses an ultrasonic…

A:

Q: A shell is fired vertically upward with an initial velocity of 2000 ft/s. It is timed to burst in 7…

A:

Q: If the length of an open organ pipe is 33.3cm then the frequency of fifth overlone will be (…

A: We need to compute- Frequency of 5th overtone=? The given data- Pipe is open at both ends.…

Q: A signal is transmitted from a ship and an echo is received from an object below the ship 4 s later.…

A:

Q: As the pressure inside a container of gases increases which of the following frequencies will…

A: According to kinetic molecular theory of gases, when you increase the pressure of gas then rate of…

Q: (II) A meteorite traveling 9200 m/s  strikes the ocean.Determine the shock wave angle it produces…

A: a) The expression of angle of shock wave is θ=sin-1vsoundvm Substitute values in the above equation…

Q: Sound travels better in solids than in gases. Why?

A:

Q: Does the velocity of sound in air depend on the frequency of the sound?

A:

Q: (II) Estimate. the. frequency. 313 x 445ksound of the ocean" when you put your ear very near a…

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Q: If a tree falls in a forest where there is no one to hear, does it make a sound?

A: When a tree falls on the ground in a forest the impact of tree on the ground produces a disturbance…

Q: The frequency reminds 1090.7 Hz. The air temperature changes to 45 ˚C. Calculate to the nearest…

A: variation of speed of sound with temperature is given by v=331.3+( 0.606×T) T is temperature in…

Q: If you shout across a canyon and hear the echo 0.80 s later, how wide is the canyon?

A: Given, t = 0.80 s  The width of the canyon can be determined by,  2 x width = speed of sound x time…

Q: "The length of pipe closed at one end it open at both ends is 32 cm each. The frequency of first…

A: We have to find- Frequency of 1st overtone in pipe open at both end. Given- Length of pipe closed at…

Q: An explosion occurs just below the surface of the water, will you hear it first if you are on the…

A: According to the problem, the explosion happens under the water; therefore, we consider two cases to…

Q: (II) Two automobiles are equipped with the same singlefrequency horn. When one is at rest and the…

A: Speed of source, vs=18 m/s   Speed of sound, v=343 m/s   Beat frequency, ∆f=4.5 Hz

Q: The speed of sound in air at 0∘is: A) 331 m/s B) 330 m/s C) 330 ms D) 331 ms

A: The speed of sound varies with the temperature.  The speed of sound in air at 0 degree C is nearly…

Q: (I) (a) Calculate the wavelengths in air at 20°C for sounds inthe maximum range of human hearing, 20…

A: a) The relation between the wavelength, frequency and velocity is given by,

Q: A truck sounds a horn with a frequency of 115 Hz as it approaches a cliff. The speed of the truck is…

A: Given: Frequency of emitted sound =115 Hz speed of the truck is 10.5 m s–1 speed of sound in air is…

Q: (d) Two people are speaking at the same time, with the voice of one of them slightly higher than the…

A: Pitch is that property of sound that makes it possible to judge higher or lower related to other.…

Q: Ex 66: Calculate the velocity of sound in a gas in which two waves of 2 m and 2.05 m produce 4…

A: We need to compute-Velocity of sound in gas(V)=?The data given as-λ1=2 mλ2=2.05 mNo. of beats…

Q: (4) A person hears the thunder 3 seconds after a flash of lightning is seen. At what distance has…

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Q: (I) (a) What resonant frequency would you expect from blowing across the top of an empty soda bottle…

A: To find: (a) What resonant frequency would you expect from blowing across the top of an empty soda…

Q: Sound can be heard for great distance at night or after a rainfall. Why?

A: At night or after a rainfall, the medium becomes more humid, and there are several water droplets…

Q: ball that is thrown at a 45 degree angle from the ground will travel the furtherst distance.How…

A: The given situation is the case of projectile motion , for which figure is given below: Since…

Q: A dB meter registered 125 dB when it was placed 3.90 m in front of a speaker. (ii)  Calculate the…

A: Calculate the sound intensity for 125 dB. dB=10logI1I0125=10logI110-12I1=3.16

Q: Two open organ pipes of lengths 60cm and 60.5cm produce 2 beats per second. Calculate the velocity…

A: The frequency of the first organ pipe is,The frequency of the second organ pipe is,

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.