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This is Enrico Fermi. In our project we had to write about a Fermi question mine was if al mp3 players were next to eachother how far would they reach? Before we did this project i diddn't know a whole lot but afterwards i could explain anything about whole numbers.

And this was my answer: In a Fermi question, the goal is to get an answer to an order of magnitude (typically a power of ten) by making reasonable assumptions about the situation, not necessarily relying upon definite knowledge for an "exact" answer. **//If all the MP3 players were placed next to each other, how far around the World would they reach?//** **__What is the circumference of the earth?__**
 * // If all the MP3 players were placed next to each other, how far around the World would they reach? //**
 * __ FERMI’S LOGIC __**
 * __Question:__**
 * //If all the MP3 players were placed next to each other, how far around the World would they reach?//**
 * A Fermi question is posed with limited information given:
 * A Fermi question requires that students ask many more questions:
 * What is the circumference of the earth?
 * What obstacles, such as mountains and valleys would increase the number of MP3 players’ required?
 * What are the dimensions and size of a MP3 player?
 * How many MP3 players are there in the world?
 * A Fermi question demands communication.
 * A Fermi question utilizes estimation.
 * A Fermi question emphasizes process rather than "the" answer.

40,075.16 KM – EQUATOR = 40,075,160,000 mm

40,008 KM – POLES = 40,008,000,000 mm

MP3 players come in all shapes and sizes, and with different capabilities, both in storage and in power. There are three basic types of MP3 players, Hard Drive, Micro Drive, and Flash Based players.
 * __What are the dimensions and size of a MP3 player?__**

For this project I have chosen a common and average sized MP3. Size: 95 X 56 X 14 (mm)

In April, 2007 Apple® announced that they had sold over 100,000,000 iPods from its launch in November of 2001 to date worldwide. **Fiscal Year Sales of iPods Worldwide**2002 – Under 10,000,0002003 – Under 10,000,0002004 – Under 10,000,0002005 – 22,000,0002006 – 40,000,0002007 – 52,000,0002008 - 55,000,000 2009 – 54,000,000 These figures represent only Apple® sales. Including other brands we could surmise that the planet could easily have over 400,000,000, and that’s not including old and discarded ones. If all the MP3 players were placed next to each other I believe they could reach all round the world. Below is an estimate of how many it would take by dividing the width of the MP3 player by the circumference of the World in a straight line with no obstacles. Even with obstacles such as mountains, there would be more than enough to go around
 * __How many MP3 players are there in the world?__**
 * __ Answer __**

POLES – 421,136,842 MP3 players

EQUATOR – 421,843,789 MP3 players