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myrzilka [38]
4 years ago
9

FASSST!!!physical science!!!!!

Biology
1 answer:
jeka944 years ago
7 0

Answer

#21

2 for NaF

1 For Br2

2 For NaBr

1 for F2

#22

1 for P4

3 for O2

2 for P2O3

Explanation:

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Which is the least number of seismograph stations needed to locate the epicenter of a earthquake
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At least three seismograph stations are needed to locate the epicenter of a earthquake.

Further Explanation:

An <u>earthquake</u> occurs when two region of the earth slip past each other. Fault plane is the area where the slip occurs. <u>Hypocenter</u> is the region below the earth’s surface where earthquake starts while the <u>epicenter</u> is the region above it.

The earth consists of four major layer:

1. Inner core

2. Outer core

3. Mantle

4. Crust

<u>Seismographs</u> is an instrument used to record the earthquake. The recording done by this instrument is called as the <u>seismograms</u>.

The seismograph comprises of:

1.  A base: is fixed tightly in the ground  

2. Heavy weight: hangs freely

When the earthquake occurs, the ground shakes and in turn the seismograph also shakes while the hanging weight does not shakes. During the earthquake, the difference in the location between the shaking piece and the motionless piece is recorded. Magnitude of the earthquake is recorded as one for each earthquake. The magnitude of earthquake is measured by the <u>Richter scale</u> but is more commonly measured through <u>moment magnitude scale</u>.

Learn more:

1. Learn more about earth brainly.com/question/5956881

2. Learn more about earth science brainly.com/question/1553517

3. Learn more about how sun energy reaches earth brainly.com/question/1140127

Answer Detail:

Grade: College biology

Subject: Biology

Chapter: Natural calamity

Keywords:

Seismograph stations, earthquake, fault plane, hypocenter, epicenter, inner core, outer core, mantle, crust, seismographs, instrument, seismograms, magnitude.

8 0
3 years ago
Read 2 more answers
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