Q:

The magnitude, M, of an earthquake is defined to be M=log I/S, where I is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and S is the intensity of a “standard” earthquake, which is barely detectable. What is the magnitude of an earthquake that is 35 times more intense than a standard earthquake? Use a calculator. Round your answer to the nearest tenth.

Accepted Solution

A:
Answer:The answer is option BStep-by-step explanation:We need to find the magnitude of an earthquake a 1000 times more intense than a standard earthquakeBe S, the intensity of a “standard” earthquake,I intensity of new earthquake I = 1000*SThen,M=log (I/S)M=log (1000*S/S)M = log (1000) = 3