first one around 2/3 of around 11 which is around 7, ok
9 = log (about 10^9 )check
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The Richter scale is used to measure the intensity of an earthquake. If E, measured in joules, is the energy released during an earthquake, then the magnitude is given by,
M = 2/3 log(E/E_0)
Where E_0 = 10^4.4 joules
1. If 8 x 10^14 joules of energy are released during an earthquake, what is the magnitude of the earthquake?
answer: M = 2/3 log_10((8×10^14)/(1×10^4.4)) =~7 - Magnitude on the Richter scale
2. How much energy will be released in an earthquake with a magnitude of 5.9?
Answer: 5.9 = 2/3 log_10(P/(1×10^4.4))
P = 1.77828×10^13
- Joules - the amount of energy released in a 5.9 Magnitude earthquake.
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