A sound wave traveling through dry air has a frequency of 16 Hz, a wavelength of 22 m, and a speed of 350 m/s. When the sound wave pass through a cloud of methane, its wavelength changes to 28 m, while its frequency remains the same. What is its new speed? (T
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- A giant sea monster chases a deep sea submarine near the bottom of the North Atlantic. The submarine is moving at 30 m/s. The sea monster sends out a sonar signal (sound) of frequency 1000 Hz. The signal received by the sub has a frequency of 985 Hz. The speed of sound in saltwater is 1530 m/s. Determine the speed of the sea monster _________________ and if the sub is in trouble (yes or no)___________________A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 5.83 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect a bat can detect?mmA bat traveling at a speed of 18.1 m/s sends out sound at a frequency of 48.2 kHz, can 'see' objects due to echolocation. What frequency would the bat hear returning from a stationary wall in front of it? (assume the speed of sound in air is 343 m/s)
- While sitting next to a road on a calm, warm 27.9ºC evening, you see an ambulance's lights flashing in the distance coming towards you. You hear a frequency of 150 Hz (you have a very keen ear!). However, you know that ambulances have sirens that emit sound at 140 Hz. How fast is the ambulance approaching you, in m/sA source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 4.2 x 10-³ W/m². What is the total sound power P emitted by the source? P = Number 1 UnitsAn ultrasound unit is being used to measure a patient’s heartbeat by combining the emitted 2.0 MHz signal with the sound waves reflected from the moving tissue of one point on the heart. The beat frequency between the two signals has a maximum value of 520 Hz. What is the maximum speed of the heart tissue?
- The intensity of a certain sound wave is 4.0 x 10-4 W/m2. If the intensity level of the sound increases by 30 dB, the intensity has increased to which of the following: 1.2 x 10-2 W/m2 4.0 x 10-2 W/m2 4.0 x 10-1 W/m2 1.33 x 10-1 W/m2A source of sound changes, so that it outputs half of its original power. If the distance between you and the source didn't change, by what factor does the sound intensity you experience change?A hiker shouts towards a vertical cliff that is 465 m away. The echo is heard 2.75 s later. What is the speed of sound of the hiker's voice in air?
- The speed of sound in air cannot be less than 331 m/s. True or False?Determine the wavelength of the sound for 24 Hz. Determine the wavelength of the sound for 23 kHz.Doppler uses ultrasound to measure blood flow velocities. Assume that the device emits sound at a frequency of 3.2MHz, and that the speed of sound in human tissue is 1540 m/s What is the expected pulse rate if blood flows in the arteries of the large leg at a speed of 3) cm/s away from the source of the sound O 1260 Hz 126 Hz O 12.6 Hz O 12.6 kHz O 126 kHz O 1260 kHz 1.26MHz 0