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Apodidomai
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Hey, in the process of searching for an explanation for this problem tonight, I stumbled across this forum. I usually do well in physics, but our semester exam is tomorrow and, as I'm reviewing, I am drawing a complete blank on everything! I'll just give one problem, to see if someone could get me on the right track again.
Thanks a lot -- I am sure this is ridiculously easy, I just can't seem to pull it out of my brain.
A firework explodes in the sky releasing 20 W of sound energy in a time of .05 s. John is standing 80 m away at the time when he hears the bang. The intensity of sound at John's ear will be about:
a) 1.5 x 10^-3 Wm^-2
b) 2.5 x 10^-3 Wm^-2
c) % x 10^-3 Wm^-2
d) 2.0 x 10^-2 Wm^-2
Thanks a bunch, again.
~ Apodidomai
Thanks a lot -- I am sure this is ridiculously easy, I just can't seem to pull it out of my brain.
A firework explodes in the sky releasing 20 W of sound energy in a time of .05 s. John is standing 80 m away at the time when he hears the bang. The intensity of sound at John's ear will be about:
a) 1.5 x 10^-3 Wm^-2
b) 2.5 x 10^-3 Wm^-2
c) % x 10^-3 Wm^-2
d) 2.0 x 10^-2 Wm^-2
Thanks a bunch, again.
~ Apodidomai