# Physics

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?

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1. 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

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2. 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.

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3. That is the actual formula, worth memorizing. Vsound= 331.4+.6T, T in Celcius.

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bobpursley

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