Monday, February 28, 2011

Mnemonic to remember the Big Bang

The Big Bang is without any doubt the most important event that took place in this universe, but when did this took place? Most recent estimates say that this happened 13.7 billion years ago. Scientists believe that there were no atoms yet in the big bang, it was too hot for the protons and electrons to bind together.

How can we remember that the Big Bang occurred 13.7 years ago? Let's make use of the mnemonic major system. We now associate the big bang with the following word:
According to the mnemonic major system, a 't' represents 1, an 'm' 3 and a 'c' 7. Now you simply need to make an association between the Big Bang and the word Atomic and ... this will not be difficult.

And voila, thanks to this mnemonic you will never forget this ever again.

Saturday, February 19, 2011

The Battle of Waterloo

The Battle of Waterloo is one of the most important events in the 19th century. Napoleon was defeated. The battle took place in 1815. How to memorize this? Well, there is an easy mnemonic. Imagine that you tell this story to your children (of nephews, nieces)  before they go to bed. Tell it in a very childish manner. Then memorize the following sentence:

A Children's Story

We can now use  the mnemonic count system: count the number of letters in each word. And voila, you will not forget this year any longer.

Saturday, February 12, 2011

Easy mnemonic to memorize first 8 decimals of Euler's number

Here is a great way to easily memorize the first 7 decimals of e, the famous mathematical constant. For the non-mathematicians, the value of e is about 2.718281828.

The mnemonic makes use of  the mnemonic count system: you can the number of letters in every word of a sentence to make a mapping between a long series of digits and an (far easier to remember) sentence.

Now let's look at this key phrase:
Charles I Insulted by Cromwell's Soldiers
This is a well-known oil painting by Hippolyte Delaroche where the victorious soldiers of Oliver Cromwell were insulting Charles I of England after the Second English Civil War. Charles is in the middle of the painting below.

Count the letters in every word and you will find the first 7 decimals of e:
  • Charles --> 7
  • I --> 1
  • Insulted --> 8
  • by --> 2
  • Cromwell --> 8
  • s --> 1
  • Soldiers --> 8