Posted by **Hannah ** on Saturday, February 25, 2012 at 6:01pm.

how many seconds will elapse between seeing lightning and hearing the thunder if the lightning strikes miles away and the temperature is 100.0 degrees F?

- Physics -
**Elena**, Saturday, February 25, 2012 at 6:23pm
The sound velocity depends on temperature as

v (meters per second)=20.046•sqroot(T)

where T is absolute temperature (in Kelvins),

or

v(meters per second) = 331.4+0.6•t,

where t is the temperature in degrees centigrade

100F = 37.78 degrC

v = 331.4+0.6 •37.78=354.06 m/s.

1 mile =1 609 m.

t = s/v = 1 609/354.06 =4.54 s

- Physics -
**Hannah **, Saturday, February 25, 2012 at 6:30pm
What is the actual formula you are using? I cannot tell what you mean when you say "v=331.4 +0.6t". I want to actually learn how to do it.

- Physics -
**bobpursley**, Saturday, February 25, 2012 at 7:52pm
That is the actual formula, worth memorizing. Vsound= 331.4+.6T, T in Celcius.

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