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3 years ago

Which scale measures the amount of damage after an earthquake?

Physics

2 answers:

OLga [1]3 years ago

6 0

Mercalli Intensity Scale:

<em> is a seismic intensity scale used for measuring the intensity of an earthquake. ... It is distinct from the moment magnitude (Mw) usually reported for an earthquake, which is a measure of the energy released (sometimes misreported as the Richter magnitude, ML).</em>

IrinaVladis [17]3 years ago

4 0

Answer: The correct answer is "Mercalli intensity scale".

Explanation:

Mercalli Intensity Scale: It is an effect of an earthquake on the surface of the earth. It depicts the shaking severity. It measures the amount of damage after an earthquake or It measures the destruction.

Richter scale: It describes the magnitude of the earthquake by measuring the seismic wave. It is the energy released by the an earthquake.

Therefore, Mercalli intensity scale measures the amount of damage after an earthquake.

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2 years ago

At a certain location, Earth's magnetic field of 34 µT is horizontal and directed due north. Suppose the net field is zero exact

zheka24 [161]

Answer:

a) I = 13.77 A

b) 0 ° or to the East

Explanation:

Part a

The magnetic field by properties would be 0 at the radius on this case r =8.1 cm.Analyzing the situation the wirde would produce a magnetic field equals in magnitude to the magnetic field on Earth by with the inverse direction.

The formula for the magnetic field due to a wire with current is:

$B = \frac{\mu_0 I}{2 \pi r}$

In order to have a value of 0 for the magnetic field at the radius then we need to have this balance

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Replacing:

$B = \frac{\mu_0 I}{2 \pi r)}= B_{Earth}$

Solving from I, from the last equation we got:

$I = \frac{2 \pi r B_{earth}}{\mu_0}$

$I=\frac{2 \pi 0.081 m (34 x 10^{-6} T)}{4 \pi x 10^{-7} Tm/A}$ = 13.77 A

Part b

We can use the right hand rule for this case.

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3 years ago

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