Decibel Archives - The Nature of Mathematics

Reference Topics 10-3

May 21, 2024July 15, 2015 by elaine

There are many sites on earthquake readiness; one that shows recent quakes is listed here. You may be amazed that there are so many recent large quakes.
http://pubs.usgs.gov/fs/1999/fs151-99/

Earthquake Locator:
http://earthquaketrack.com/

These sites provide interesting decibel tests:
http://www.phys.unsw.edu.au/jw/hearing.html

The World … See the whole entry

Section 10.3: Applications of Growth and Decay

September 25, 2015July 15, 2015 by elaine

10.3 Outline

Growth/decay formula
Population growth
Radioactive decay
Logarithmic scales
1. Richter number
2. Richter scale
3. decibel
4. decibel formula

10.3 Essential Ideas

Exponential growth or decay can be described by the equation

A=A_oe^rt

where r is … See the whole entry