Physics To Go is an online monthly mini-magazine and a collection of more than 1000 websites with physics images, activites, and info. You can view an archived version of our September 1, 2010 issue, Networks below, or click to see our September 1, 2013 issue, Two views of Earth.

Physics in Your World

Why Leaves Aren't Trees image
image credit: Eleni Katifori; image source; additional image

Why Leaves Aren't Trees

This is a lemon leaf that was wounded to interfere with its circulation. Note how the network of veins enabled nutrients to flow beyond the wound.

- Click on the image to see a similar experiment with a ginkgo leaf.
- To learn about the controversy over how these different vein structures developed, see Why Leaves Aren't Trees.

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Physics at Home

Konigsberg Bridge

If you enjoy solving puzzles, try the seven bridges challenge.
- This problem helped lead the mathematician Leonhard Euler to develop new mathematical fields, graph theory and topology. See Konigsberg Bridge to learn more.
- Also see the Wikipedia page for variations on this problem.


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From Physics Research

Network Theory: A Key to Unraveling How Nature Works image
image credit: Cesar Hidalgo; image source; larger image

Network Theory: A Key to Unraveling How Nature Works

You are looking at a network diagram that shows the interconnectedness of the world economy. To learn more about this network, visit Mapping the World Economy.

- To find out how networks are related to "Six Degrees of Kevin Bacon," visit Network Theory: A Key to Unraveling How Nature Works.
- To learn about a physicist who studies networks, see Physics Rules Network Dynamics.


Worth a Look

Four Color Theorem Intro

Have you ever wondered how many colors are necessary to make a map? Four Color Theorem Intro can help you figure it out!

- To learn more see this page by Ivars Peterson.


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