n watts per square meter and I0 = 10-12 is the lowest level of sound that the average person can hear. How many decibels are e

A sound source creates a sound intensity at a certain distance. If the sound intensity is increased by a factor of 8.1, by how many decibels is the sound intensity level increased?

There was an accident and NASA engineers are trying to sort out where two of their Mars Rovers, Tango and Foxtrot, have landed. The engineers know that landing site A is much hotter than landing site B. Unfortunately, the only working sensors on Tango and Foxtrot measure the speed of sound. If Tango measures the speed of sound at it's landing site as 240 m/s, while Foxtrot measures speed of sound as 258 m/s at it's landing site, where has each rover landed?

You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. You use your fog horn to send out a blast of sound (assume the temperature of the air is 20 oC) and the time it takes for the sound to return to you is 20.0 s. How far away are the cliffs (in metric units)? Hint: Be careful and think about the physics of the problem. You may want to make a sketch of the situation to help you determine the answer.     1798 m   3444 m   3596 m   7192 m

A plane approaches you at 760 mi/h. It produces a sound at a frequency of 256 Hz. What frequency do you hear?  Let the speed of sound be 343 m/s, 1 mile = 1609.34 m, 1 hr = 3600 s

The Doppler effect causes a sound moving towards you to sound higher pitched and a sound moving away from you to sound lower pitched, like observed in listening to the car horn in the video.The equation for this is f=(cc+v)f0f=(cc+v)f0, wheref is the observed frequency (pitch) of the sound, in Hertzc is the speed of sound, about 761 miles per hour,v is the speed of the sound source, in this case the car, in miles per hourf0 is the frequency of the sound when stationaryUsing a spectrum analyzer, we could determine the observed frequency when the car was driving away was 244 Hz and the stationary frequency was 257 Hz.Use this information and the equation to estimate the speed of the car in miles/hour, to 1 decimal place.

The level of sound D in decibels is defined as follows: 10 log (10-16) I where I is the sound intensity in watts per centimeters squared. Determine the level in decibels of a sound with intensity I 10-8 watts ст?

A sound wave in a solid has a frequency of 45.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air? (The speed of sound in air is 344 m/s.) speed of sound in solid       speed of sound in solid speed of sound in air

The speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a wave in the solid is 61 kHz, then what is the wavelength? (The speed of sound in air is 344 m/s.)

A sound has a sound level of 60 dB. Its intensity is what multiple of the standard reference level for intensities? O The intensity is 60 times the standard level. O The intensity is 600 times the standard level. O The intensity is 6000 times the standard level. O The intensity is 600,000 times the standard level. O The intensity is 1,000.000 times the standard level. O The intensity is 6,000,000 times the standard level.