The half-life of Beryllium-11 is 13.81 seconds. If a sample contains 360 mg, how many mg will remain after 140 seconds? mg Question Help: ☑ Video 1 ☑Video 2 Submit Question

In 1906, San Francisco experienced an intense earthquake with a magnitude of 7.8 on the Richter scale. In 1989, the Loma Prieta earthquake also affected the San Francisco area, and measured 6.9 on the Richter scale. Compare the intensities of the two earthquakes.

The half-life of radioactive iodine is 60 days. How much of a 50-mg sample will be left in 40 days?

In 2014, Chile experienced an intense earthquake with a magnitude of 8.2 on the Richter scale. In 2014, Los Angeles also experienced an earthquake which measured 5.1 on the Richter scale. Compare the intensities of the two earthquakes.