You are on an island where a huge explosion at a distance of 500 miles away can be heard. How long (in seconds) does it take the sound to travel to your location? Assume the temperature of the air is 20 oC.

A bystander hears a siren vary in frequency from 590 Hz to 368 Hz as a fire truck approaches, passes by, and moves away on a straight street. What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.)

A dolphin uses echolocation underwater to "see" its surroundings. If the speed of sound in the ocean is 1530m/s, how long would it take for the dolphin to hear an echo if the ocean floor is 2.57km below it?

An ambulance with a siren emitting a frequency of 1600HZ overtakes and passes a cyclist pedaling a bike at 4 m/s. After being passed, the cyclist hears a frequency of 1590HZ. How fast is the ambulance moving? Temperature of air is 25°C. 2.

While driving down the road, you spot a friend standing on the sidewalk. You honk your horn at them while driving 60 km/h. Your horn emits a frequency of 330 Hz. V sound = : 343 m/s a. What frequency does your friend hear as you approach? 347 Hz b. What frequency does your friend hear after you pass by? 315 Hz

You generate a sound wave of 420 Hz with a speaker. The speed of sound is 342 m/s. You are 2 m from the speaker. You back up until you are 6 m from the speaker. What happens to the intensity of the sound you hear? Does it decrease by a factor of 2, 3, 6, or something else?

An 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?

A Girl Scout is taking a 12.00-km hike to earn a merit badge. While on the hike, she sees a cliff some distance away. She wishes to estimate the time required to walk to the cliff. She knows that the speed of sound is approximately 343 meters per second. She yells and finds that the echo returns after approximately 2.2 seconds. If she can hike 1.00 km in 7.3 minutes, how long would it take her to reach the cliff? At minutes

A 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?

From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequency that is 0.855 times smaller than that emitted by the car when it is stationary. The speed of sound is 343 m/s. What is the speed of the car?