# physics

posted by .

A group of hikers hears an echo 2.50 s after shouting. If the temperature is 20.0°C, how far away is the mountain that reflected the sound wave?

• physics -

Take velocity = 331m/s.then apply the formula.v'= v m/s+0.61m/s/C.u will get 331+0.61*20=343.then distance = v'.t÷2=343*2.50÷2=428.75 is the answer.

## Similar Questions

1. ### Physics

A bat flying in a cave sends out a sound wave to navigate. If the cave temperature is 10.8 C, and the sound the bats sends out takes 0.0679 s to echo back, how far away is the cave wall
2. ### high school physics

3seconds after a gun is fired, the person who fired the gun hears an echo. How far away was the surface that reflected the sound of the shot?
3. ### physics

A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. She hears the echo 1.7 s after shouting. Estimate the length of the lake.
4. ### phsycs

A person shouts in a canyon. 3 s later they hear the echo. How far away is the canyon wall from which the sound wave was reflected?
5. ### Physics

A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly below 3.88 s later. If the speed of sound in seawater is 1560 m/s, How deep is the ocean …
6. ### Physics

A woman is swimming when she hears the underwater sound wave from an exploding ship across the harbor. She immediately lifts her head out of the water. The sound wave from the explosion propagating through the air reaches her 4.00 …
7. ### Physics

A woman is swimming when she hears the underwater sound wave from an exploding ship across the harbor. She immediately lifts her head out of the water. The sound wave from the explosion propagating through the air reaches her 4.00 …
8. ### physics

a sound wave of frequency 1.2hz is reflected from a barrier 75m away and its receiver 0.5 sec after transmission.calculate the wave length of the sound
9. ### Physics

A hiker shouts when he is at the top of a mountain. He hears an echo 2.4 seconds later from the sounds reflection off a nearby mountain. Calculate how far he is from the nearby mountain. (Assume speed of sound in air is 340 m/s)
10. ### physics

A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. She hears the echo 2.20 s after shouting. How long (in meters) is the lake?

More Similar Questions