Homework Help: physics

Posted by Tammy on Monday, October 15, 2007 at 1:59pm.

when lightning strikes you can see it at a speed of 3x10^8m/s. But you hear thunder at about 340m/s in 70 degrees air temperature. a) If you are a mile away from lightning, how long of a delay is there?
b) if the delay between the lightning and thunder were 1s how far away would you be in km and in miles?

a) I used d=d_0+v_0t+1/2at^2
which becomes d=v_0t
1609.34=340t
t=4.73s
b) d=v_0t
d=3x10^8 m/s(1s)
d=3x10^8m
=18641.14mi
=300,000 km

But this doesn't make any sense. Did i do something wrong?

physics - DrBob222, Monday, October 15, 2007 at 2:31pm
In part b you used the speed of light for Vo but its the speed of sound that determines how long it takes to hear it.

Answer this Question

Related Questions

Physics - how many seconds will elapse between seeing lightning and hearing the ...
Physics - suppose that you wish to determine how far away from your position ...
Grad 11 physics - During thunder and lightning storm, an observer heard the ...
Physics - lightning strikes a tower 4 km away. how long after the strike will ...
Physics - How many seconds will elapse between seeing lightning and hearing the...
Chemistry - The activity series is : Potassium Soduim Calcium Magnesuim ...
physics - you see lightning and then count 4 seconds till you hear the thunder. ...
Physics - Find the speed of light in flint glass if the index of refraction is n...
physics - The speed of sound in air is about 330m/sec. If a lighting flash ...
Math - In a lightning storm, the number of seconds between the flash and the ...

For Further Reading

First Name:
School Subject:
Answer: