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Chad Orzel "Prof. Orzel gives the impression of an everyday guy who just happens to have a vast but hidden knowledge of physics." (anonymous student evaluation comment)

The miscellaneous ramblings of a physicist at a small liberal arts college. Physics, politics, pop culture, and occasional conversations with his dog.

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Basic Concepts:

Tons of Rain

How much rain is a ton?

Basic Concepts: Polarization of Light

What do we mean when we talk about polarized light?

Basic Concepts: Fermi Questions

How many shopping malls are there in the United States? How to guess the answer without using Google.

Basic Concepts: Estimation and Dimensions

Order of magnitude estimates and dimensional analysis are two crucial elements of the physicst's mental toolkit.

Basic Concepts: Ohm's Law

Scott Aaronson asked for an explanation of Ohm's Law in terms of the motion of electrons, which happens to be tomorrow's lecture topic...

Basic Concepts: Measurement

Measurement is the process by which we determine the properties of the world around us.

Basic Concepts: Energy

The energy content of an object is a measure of its ability to change its own motion, or the motion of another object.

Basic Concepts: Fields

An attempt to give a really basic explanation of the concept of fields in physics, and why they're sometimes particles.

Basic Concepts: Force

Pretty much everything I can think of to say about the concept of "force" in physics.

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