Given speed of sound in air =340m/second and speed of lightin vacuum=3lakh kilometer per second
2007-01-10 03:59:58 · 5 answers · asked by bihariraja 3 in Science & Mathematics ➔ Physics
Sound is about 660 mph. Light instantaneous, at that distance.
So (2/(60*60) )*660 = .37 miles
What's a meter? :-)
2007-01-10 04:07:46 · answer #1 · answered by Wonka 5 · 0⤊ 0⤋
Distance = d
Lightning speed = 3 lakh km/s = 3 x 10^5 x 1000 m/s = 3 x 10^8 m/s
Time taken by lightning = d / (3 x 10^8) s
Sound speed = 340 m/s
Time taken by sound = d / 340 s
Time difference between flash and sound = 2 seconds
d/340 - d/(3x10^8) = 2
d (299979660)/(340x3x10^8) = 2
d = 2 x 340 x 3 x 10^8 / 299979660 =680.046
Distance = 680.046 m
2007-01-10 12:37:24 · answer #2 · answered by Sheen 4 · 0⤊ 0⤋
Assuming the noise travels directly in a straight line to the person...
The distance travelled by the thunder is 680m (2 x 340)
Apart from that I can't help you. If you want a specifc height you would need to know at what angle the cloud was from the person to use trigonometry.
2007-01-10 12:11:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋
what is 3lakh km/second ? You were two seconds away from the intial sound or 680 meters away.
2007-01-10 12:06:27 · answer #4 · answered by Gene 7 · 0⤊ 0⤋
it can be longer than that, depending on how far away the storm is.
2007-01-10 12:03:48 · answer #5 · answered by happyday to you 7 · 0⤊ 1⤋