Physics: What is the ratio of the intensities of an earthquake p wave passing through the earth and detected at two points 15 km and 49 km from the source

What is the ratio of the intensities of an earthquake

genyjoannerubiera

15.01.2022

Explanation:

Intensity is defined as a time-average measure of the Power density of any wave at a particular location.

Intensity of a wave is inversely proportional to the square of the distance from the source i.e.

$I\propto \frac{1}{d^2}$

$d_1=15\ km$

$d_2=49\ km$

$\frac{I_1}{I_2}=(\frac{d_2}{d_1})^2$

$\frac{I_1}{I_2}=(\frac{49}{15})^2$

$\frac{I_1}{I_2}=(3.266)^2$

$\frac{I_1}{I_2}=10.67$

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Bucsan8688

13.10.2020

500 J

Explanation:

The gravitational potential energy of a body can be found by using the formula

GPE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 10 m/s²

From the question we have

GPE = 5 × 10 × 10

We have the final answer as

500 J

Hope this helps you

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