Question 1:A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.9 x 10^2 µm. Find this earthquakes magnitude on the Richter scale.Question 2:An artifact was found and tested for its carbon-14 content. If 81\% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Assume that carbon-14 has a half-life of 5,730 years.1. Magnitude = logA – 2.48 + 2.76logD = log(590) -2.48 + 2.76 log(300) = 7.132. Using the formula half-life t= 0.693 /k to calculate k, I then substitute this value in the equation. ln(Initial Concentration / Concentration at given time) = k x timeln(1/0.81) = k x timeSolving for time, the answer is 1700 years

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