An Earthquake in the Japan in 2011 Was About 10 $R = \log \frac { I } { I _ { 0 } }$

question 19

Multiple Choice

An earthquake in the Japan in 2011 was about 10 9 times as intense as the reference intensity. Find the Richter number for that earthquake. NOTE: Seismologists use the Richter scale to measure and report the magnitude of earthquakes. The equation $R = \log \frac { I } { I _ { 0 } }$ compares the intensity I of an earthquake to a minimum or reference intensity I 0.

• A)10 9
• B)10
• C)9
• D)none of these

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Definitions:

Dopamine

A type of neurotransmitter in the brain that plays a key role in controlling the reward and pleasure centers, as well as regulating movement and emotional responses.

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