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Chemists calculate pH by taking the opposite decimal ...
logarithm of the hydrogen concentration on a substance.
Coffee has pH of 4.
The pH scale is logarithmic: an increase of pH in one ...
means 10 times in concentration!
Our stomach with a pH of one is 10 times more acidic than ...
lemon with a pH of two, 100 times more acidic than ...
cola and 1,000 times more than coffee.
The Richter scale for earthquakes is decimal.
A difference of 1 point on this scale equates to a 10-fold ...
difference in the amplitude of the earthquake.
This means that an earthquake that measures 6 ...
on the Richter scale is 10 times stronger than one that measures 5.
We use logarithmic scale to measure sound in decibels.
Our breathing is about 10 decibels.
The noise of a hairdryer is about 90 dB.
An an increase of 10db is perceived to be approximately ...
twice as loud. Perhaps that next time that ...
you want to dry your hair, you should let it breath!
You may not realise, but you have been using ...
decimal logs for a long time!. Increasing the index of a base ...
10 power by one makes the number 10 times bigger
In other words, making the number 10 times ...
bigger increases logarithm by one ONLY | This is great ...
news when manipulating amounts that vary a lot as ...
their logarithms do not change that much.
We can use our calculator to find the decimal logarithm of ...
any positive number. For example,
the decimal logarithm fo 100 is 2 because 10 to the index 2 is 100.
Logarithm is just another fancy word for index:
we combine them just as we combine indices.
When multiplying, we add.
When dividing, we subtract.
Decimal logarithms are useful when solving exponential ...
equations and this is a very important skill to master.
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