Lesson 16- Earth Quakes, pH, and Decibel Scales

Earth Quakes - Richter Scale
4.0 » 5.0 = x10 times as much   
5.0 » 6.0 = x 10 times as much
4.0 » 6.0 = x 100 times as much

Rate= 10   P= 1


pH  scale:

              
R= 10  P= 1


Sounds Decibels:

 

40 dbs  > whisper      90 dbs > shout

           |  100000 times louder   |

R= 10      P= 10


Example 1:
How much more intense is an Earthquake of 6.8 to a 3.5?
F=IR ^ t/p                     M= magnitude   M=F       I= 1            t= change   
(delta)t= 6.8 - 3.5 = 3.3
M= 10^ 3.3/1
M= 1995.26

Example 2:
A chainsaw of 105dbs to a whisper of 40dbs
M= 10^ 65/10                      105-40= 65
M= 10^ 6.5
M= 3162277.66

Example 3:
Find the pH that is 80x more basic than water?
water= pH 7
M=R ^t/p
80= 10 ^t
log 80 = t log10                    *note log10 = 1
1.90= t
7+ 1.9= 8.9
t= 8.9
WATCH: when its basic you have to add the number to original equation, when it is acidic the number is the same