Tag Archives: chart

Chart – 21st century has already created more goods than previous 1,900 years


 

  • In the first decade of the 21st century, the population of the world produced more economic output than in the first 19 centuries of the common era combined.
  • If people do make history, then two people make twice as much history as one. Since there are almost 7 billion people alive today, it follows that they are making seven times as much history as the 1 billion alive in 1811.
  • Measured in years lived, the present century, which is only ten years old, is already “longer” than the whole of the 17th century.
  • Over 23% of all the goods and services made since 1AD were produced from 2001 to 2010, according to an updated version of Angus Maddison’s figures.
  • 55% of all goods and services were made in the 20th century.

 
via - The Economist – Two thousand years in one chart, More 2,000 years in a single graphic

Science Experiment: How fast can you react?

I love this piece from Scientific American, written in the format of a teaching lesson, instructing you how to perform a science experiment: How Fast Can You React?

Key concepts:
Reaction time
Neuroscience
Gravity

Introduction
Think fast! Have you ever noticed that when someone unexpectedly tosses a softball at you, you need a little time before you can move to catch it (or duck)? That’s because when your eyes see an incoming signal such as a softball, your brain needs to first process what’s happening—and thenyou can take action. In this activity, you can measure just how long it takes for you to react, and compare reaction times with your friends and family.

Materials
·    Ruler (inches or metric)
·    Paper
·    Pencil
·    Chart (below)

 

Keep readingHow Fast Can You React?

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Gasoline use drops to 2001 levels – recent data shows

The following chart shows U.S. petroleum and gasoline usage for the same three-month period (Dec-Feb) going back to 1992.

Note that petroleum usage is back to 1995 levels, and gasoline usage is back to 2001.

Chart via Global Economic Analysis - (thx to Steven Witt for the tip)

 

This graph highlights a continuing U.S. trend where oil imports have also dropped to 13 year lows, and we are importing less than half of our oil.