The velocity of seismic waves generally increases with depth in the earth.
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The change in surface area of Gaussian surface with radius (r) is 8πr.
<h3>Electric field from Coulomb's law</h3>The electric field experienced by a charge is calculated as follows;
where;
- E is the electric field
- Q is the charge
- r is the radius
The electric field reduces by a factor of
The surface area of a sphere is given as;
Thus, the change in surface area of Gaussian surface with radius (r) is 8πr.
Learn more about area of Gaussian surfaces here: brainly.com/question/17060446