2006-07-28 12:02:15 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Between Mountain Ranges - In caverns
2006-07-28 12:06:47 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Hi. You don't list any locations so I'll give you a general answer. Sound travels at about 1,000 feet per second -this is not exact but makes the math a lot easier. If you stand facing a wall or building and hit a drum then the sound of the drum will take 1/1000 second per foot to get there and 1/1000 of a second per foot to get back. If you were 100 feet from the wall you would hear an echo when the sound got back to you. Since in this case the round trip is 200 feet. This means the echo would be heard 200/1000 (or 2/10) of a second later. If the wall was 500 feet away the sound would travel 1,000 feet to get there and back and the echo would be 1 second after you struck the drum. If lightning struck 5,000 feet away, how many seconds would it take for you to hear the thunder? Hope this helps you get started.
2006-07-28 12:20:14 · answer #2 · answered by Cirric 7 · 0⤊ 0⤋
the conditions for echo are:
1.minimum distance between source of sound and reflecting object must be 17 metres.
2.the wavelength of sound must not be greater than the height of the reflecting object
3.the intensity of sound should be high enough so that it could be reflected.
apply these to ur location and find out if the echo could be heard
2006-07-30 09:11:44 · answer #3 · answered by Ariel 2 · 0⤊ 0⤋
You said, "which one of the following locations", and then didn't list any locations.
2006-07-28 12:15:20 · answer #4 · answered by Anonymous · 1⤊ 0⤋
i think you forgot to list the locations lol
2006-07-28 13:32:15 · answer #5 · answered by Rajan 3 · 1⤊ 0⤋
a cave
2006-07-28 12:11:12 · answer #6 · answered by slims 2 · 0⤊ 0⤋