How are Logarithms used in the real world?

Question

this is all for my Algebra 2- logarithmic project!! i need some serious help!! thanx guys who already answered

Answer 1

Almost all electromagnetic radiation and reception systems (radio, TV, fiber optic, etc), all sound systems are designed using various decibel scales which are all logarithms (base 10).

Many analog circuit design problems involve exponential behavior and inverse logs.

Slide rules all use physical representations of logarithms to multiply and divide.

Most of our senses respond in logarithmic ways to stimulation.

The things are everywhere!

Answer 2

In measuring sound, the decible scale is a logarithmic scale.

The Richter scale is also logarithmic.

Things that grow or decay exponentially include: Populations, investments, radioactive material.

Anytime someone notices that a data set seems to have an exponential or logarithmic curve, you can then predict the behavior of future trends.

Just look in your algebra text for the story problems involving logarithms.

Answer 3

Logarithms are used when solving anything that has an exponential relationship. Some common examples are half-lives of unstable chemical substances, which is useful for practical purposes like radiocarbon dating to determine the age of something that was once biological.

Answer 4

Security systems use some kind of logarithm in their signals. I think it's in the encryption and also in transmitting signals like from car alarms.

Try these:

http://www.epa.gov/eogapti1/module1/logarithms/logarithm.htm

http://www.ams.org/featurecolumn/archive/internet.html

Answer 5

in calculating compound interest

in calculating areas under a function

in simplifying complex calculations

in calculating exponent

in calculating how many digits in long multiplication