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3 years ago

If the wave is detected 12.5 minutes after the earthquake, estimate the distance from the detector to the site of the quake

Physics

1 answer:

umka2103 [35]3 years ago

5 0

Answer:

Remember the relation:

Speed*Time = Distance.

We can estimate that the speed at which an earthquake "moves", in the surface, is:

S = 6km/s (this is a low estimation actually)

Then if the wave is detected 12.5 minutes after the earthquake, we know that it traveled for 12.5 minutes before reaching the detector.

So we know the speed of the wave and the time it took to reach the detector, then we can use the equation:

Speed*Time = Distance.

to find the distance.

First, we should write the time in seconds

we know that:

1 min = 60 s

then:

12.5 min = 12.5*(60 s) = 750 s

Then, the wave traveled with a speed of 6 km/s for 750 seconds until it reached the detector, then the distance that it traveled is:

(6km/s)*750s = 4500 km

The distance between the detector and the site of the quake is around 4500 km.

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What is the strength of the electric field 0.1 mmmm below the center of the bottom surface of the plate

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A thin, horizontal, 12-cm-diameter copper plate is charged to 4.4 nC . Assume that the electrons are uniformly distributed on the surface. What is the strength of the electric field 0.1 mm above the center of the top surface of the plate?

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$E =248.2 \ N/C$

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If the wave is detected 12.5 minutes after the earthquake, estimate the distance from the detector to the site of the quake​

If the wave is detected 12.5 minutes after the earthquake, estimate the distance from the detector to the site of the quake