With the latest pandemic, most of us are working from home…
Infographics courtesy of Mark Rhodes, Microsoft Australia
Mi niece is in middle school. Over FaceTime today she mentioned she was taking logarithm lessons in math. I was so happy she found them interesting!
She did ask though, “I don’t think I will ever use them though. Why do I need to know what a logarithm is to go buy groceries, for instance?”
I rolled my eyes and told her… well, if you go to the store and find a packaged meal that has a pH of 4 and the next similar meal has a pH of 3, you should know that’s a logarithmic scale with base 10 and the second meal is 10 times more acidic than the first one.
If you go to a rock concert and and the sound engineer is asked to pump the volume up and he increases 10dB, on the scale, that is equivalent to a 10-fold increase in sound intensity (which broadly corresponds with a doubling in loudness). Decibels (sound intensity) is also a logarithmic scale. You ears respond to sound in a logarithmic manner.
If you hear in the news a possible earthquake and they give the intensity in the Richter scale, you should know that, that is also a logarithmic scale. If they announce stronger aftershocks, you should know the Richter scale actually corresponds to the square root of 1000, which is a 31.6 times increase in the energy on the quake. If they announce a Category 5 earthquake and then a 6 one, that one will be 31.6 times stronger… and please, please, please, go to safety…