Ziyi

How many times larger is the intensity of a sound if you move from 20 m away from it to a distance of 2m? I think I'm supposed to use the ratio (r1/r2)^2, but I don't know which is which; I don't even know if that's the correct formula.

A construction worker needs to move away from a sound source which is 10m away. If the intensity at that distance is 4*10^-2 W/m^2 and they want to move to make it 3*10^-6 W/m^2, how far away do they have to move? I'm using the equation I2/I1=(r1/r2)^2, b...

The sound intensity at a certain distance from a car is 2*10^-7 W/m^2. - If the distance is tripled, what is the new intensity of the sounds? - if the distance is halved, what is the new intensity of the sound? for the first question I tried doing I2/2E^-...

You're at a concert at a distance of 10m away from the band and their sound level is 120dB. How far back do you have to move if you want the sound level to be 85 dB? I tried using 85=(10/r1)^2, but this doesn't seem to be working.

I think so, so I divide the current distance by the new one and square, right? because that's what I'm getting from the equation, so, I think I get it, thank you! :)

oh, okay, I see; thank you very much.

oh, so, the original radius is 1 and you're dividing that by 3? but if you're 'halving' it, would it be 1 divided by 1/2? correct me if I'm wrong, but for problems where I'm just told the distance is tripled, halved, etc, I take one. divide it by 3, 1/2,...

...una habitante nativa de Los Angeles ...Ella es mejor conocida por... ...la historia de las personas.... ...trabajaron (perhaps, or are they still working on it?) en el mural cada verano.