Lucretia (a somewhat eccentric physics student) has her left ear against the concrete driveway. If someone drops a metal trash can onto the driveway about 30 m away (close enough to easily hear any sound made), will she hear one sound or two? If two, which one arrives first? Be sure to support your reasoning with evidence.

Q: Note that the speed of sound in air is 340 m/s and the speed of sound in water is 1500 m/s. An…

A: Given, The speed of sound in air is 340 m/s and the speed of sound in water is 1500 m/s. An…

Q: he sound level b in decibels is given by b=10  (I / I0), where I is the intensity of a given sound…

A: Givenb=10 logIIowhere I is the intensity of a given sound and Io is the minimum detectable intensity…

Q: If the wavelength of a sound wave of frequency 250 Hz is 1.4 m, calculate the speed of the wave. * O…

A: Given,  The wavelength of the sound wave λ =1.4 m. The frequency of the sound wave (f) = 250 Hz.

Q: A stone is dropped from rest into a well. The sound of the splash is heard exactly 3.30 s later.…

A: v=331 m/s+0.61TC=331 m/s+0.6116=340.76 m/s

Q: What are the longest and shortest wavelengths of sound that can be heard by a bat in air where the…

A: Bats use echolocation to navigate and hunt, emitting ultrasonic sounds and then analyzing the echoes…

Q: Sound 1 has an intensity level 23.0 dB higher than Sound 2. What is the ratio of their intensities,?

A:

Q: A sound wave travelling in a dense medium has a frequency of 20 KHz and a wavelength of 40 cm. What…

A: Write the expression for the speed of the waveform. Here, n represents the frequency and λ…

Q: A stone is dropped from rest into a well. The sound of the splash is heard exactly 3.00 s later.…

A: Given:initial velocity of the stone, u = 0 m/stime taken to hear splash after stone is droped, to =…

Q: A sound has a certain intensity I1. It suddenly increases to I2 so that I2 = 250I1. What is the…

A: We can calculate sound level β of the sound of intensity I from its definition. β (dB)=10log10II0

Q: A group of hikers hears an echo 3.20 s after shouting. How far away is the mountain that reflected…

A: Given, time (t) = 3.20 s             speed of sound (v) = 346 m/s The sound pulse emitted by the…

Q: A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.70 s later.…

A: The given data are: t=1.7 mT=16 °C Here, t is the time and T is the temperature.

Q: For the speed of sound in air, use v = 339 m/s. Two speakers stand against a vertical wall, distance…

A: Given: Speed of sound in air, Use v = 339 m/s The distance that two speakers stand against a…

Q: You are moving at 90 km/h toward a train which is moving toward you at 75 mi/h. The train blows its…

A:

Q: A hiker shouts toward a vertical cliff 485 m away. The echo is heard 3 seconds later. The wavelength…

A: Given: The distance of the cliff is 485 m. The echo is heard 3 s. The wavelength of the sound is 2…

Q: We want to build a flute with two open ends. We want to flute to produce a sound of 388 Hz…

A: Given :       Frequency of the turning fork, ft = 388 Hz      Fundamental frequency of the flute, ff…

Q: The motion detectors used in our labs are ultrasonic, operating at 25,000 Hz.  In a lab room where…

A: