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	<title>Pop Physics</title>
	
	<link>http://popphysics.com</link>
	<description>Clear, Insightful, and Math-Free</description>
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		<title>Video: the Arrow of Time</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/71s37AEhEQ0/</link>
		<comments>http://popphysics.com/links/video-the-arrow-of-time/#comments</comments>
		<pubDate>Thu, 23 May 2013 20:22:24 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Links]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=773</guid>
		<description><![CDATA[We&#8217;re halfway through our discussion of entropy, which is a perfect place to take a quick break for a video. It may not be very exciting, and it may not be very clearly explained, but it&#8217;s related to our current topic and may at least ignite your curiosity a bit. We&#8217;ve all thought about time, [...]]]></description>
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		<item>
		<title>5.6 Entropy, Part 1: What Is It?</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/2bhB2NpsdIs/</link>
		<comments>http://popphysics.com/chapter-5-energy-and-heat/entropy-part-1-what-is-it/#comments</comments>
		<pubDate>Thu, 09 May 2013 15:22:12 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Chapter 5: Energy and Heat]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=755</guid>
		<description><![CDATA[Critical Questions: What is entropy? Why can’t we build a machine with 100% efficiency? In order to gain a full appreciation for energy, the last idea you’ll need to understand is something called entropy. It&#8217;s kind of a tough one, but I guarantee it&#8217;ll be worth it if you persevere to the end of this [...]]]></description>
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		<item>
		<title>New 3D Panorama from Mars</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/nEUrrgNo8mg/</link>
		<comments>http://popphysics.com/links/new-3d-panorama-from-mars/#comments</comments>
		<pubDate>Tue, 09 Apr 2013 02:32:36 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Links]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=715</guid>
		<description><![CDATA[This lovely 3D panorama, which was made by photographer Andrew Bodrov, is a stitched-together collection of photos taken by the Mars Curiosity rover. It&#8217;s a desolate image, but still immersive and a bit magical. From a related Wired article: &#8220;The best way to enjoy it is to go into fullscreen mode and slowly soak up [...]]]></description>
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		<title>5.5 Heat and Temperature</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/LA2xKVsTXiE/</link>
		<comments>http://popphysics.com/chapter-5-energy-and-heat/5-5-heat-and-temperature/#comments</comments>
		<pubDate>Tue, 19 Mar 2013 13:51:32 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Chapter 5: Energy and Heat]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=707</guid>
		<description><![CDATA[Critical Questions: What is the difference between heat and temperature? What happens when water freezes or boils? It may seem out of place to start talking about heat and temperature in the middle of a chapter about energy, but in fact, there are many connections between these ideas. And in order to understand the ways [...]]]></description>
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		<title>Brian Cox Introduces You To Quantum</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/WyuGbCJ4b4w/</link>
		<comments>http://popphysics.com/links/brian-cox-introduces-you-to-quantum/#comments</comments>
		<pubDate>Fri, 08 Mar 2013 03:51:32 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Links]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=691</guid>
		<description><![CDATA[Here it is: a lifeline to get you through this Pop Physics drought. Professor Brian Cox, host of the excellent BBC series Wonders of the Universe, delivering a fun and insightful introductory Quantum Physics lecture. Complete with celebrities like Simon Pegg, a million-pound diamond, and a breathless northern English accent. Professor Brian Cox: A Night [...]]]></description>
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		<title>A Real Perpetual Motion Machine, in the Wild!</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/D-smQD82lpQ/</link>
		<comments>http://popphysics.com/links/a-real-perpetual-motion-machine-in-the-wild/#comments</comments>
		<pubDate>Thu, 07 Feb 2013 14:52:05 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Links]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=681</guid>
		<description><![CDATA[Somewhat coincidentally, I just came across this video of a supposed perpetual motion machine / free energy device via reddit. It&#8217;s a coincidence because my last post was all about perpetual motion and why it&#8217;s impossible. It may seem like a bit of an archaic problem to tackle, but as the popularity of this video [...]]]></description>
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		<item>
		<title>5.4 Perpetual Motion Machines</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/wAvUFwFtxVc/</link>
		<comments>http://popphysics.com/chapter-5-energy-and-heat/perpetual-motion-machines/#comments</comments>
		<pubDate>Wed, 23 Jan 2013 22:51:40 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Chapter 5: Energy and Heat]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=674</guid>
		<description><![CDATA[Critical Question: What are perpetual motion machines, and why are they impossible? There was an episode of The Simpsons in which Lisa made a perpetual motion machine, which angered Homer because “it just keeps going faster and faster.” Later, he called her into the room and yelled, “In this house, we obey the laws of [...]]]></description>
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		<title>5.3 Conservation of Energy</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/n2MlOHPCueg/</link>
		<comments>http://popphysics.com/chapter-5-energy-and-heat/conservation-of-energy/#comments</comments>
		<pubDate>Wed, 09 Jan 2013 19:37:33 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Chapter 5: Energy and Heat]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=662</guid>
		<description><![CDATA[Critical Questions: What is energy? What do all of the different types of energy have in common? How do we use food to move ourselves around? Now that we’ve described a bunch of different types of energy (in the previous post), we can talk about how they behave. Following on Mr. Feynman’s comments, each of [...]]]></description>
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		<item>
		<title>Using Ancient Ovens to Trace the History of Earth’s Magnetic Field</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/_jvsfETZoIg/</link>
		<comments>http://popphysics.com/links/using-ancient-ovens-to-trace-the-history-of-earths-magnetic-field/#comments</comments>
		<pubDate>Thu, 20 Dec 2012 15:05:25 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Links]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=653</guid>
		<description><![CDATA[Scientists have known for some time that the Earth&#8217;s magnetic field has undergone significant changes throughout the planet&#8217;s history. In fact, about once every few hundred thousand years, it completely reverses &#8211; what was once magnetic north is now magnetic south.[1] There is a lot of evidence for this, the most convincing of which is [...]]]></description>
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		<item>
		<title>Voyager’s Photos: Our Message to Space</title>
		<link>http://feedproxy.google.com/~r/PopPhysics/~3/l9AM4uJG2Po/</link>
		<comments>http://popphysics.com/links/voyagers-photos-our-message-to-space/#comments</comments>
		<pubDate>Tue, 04 Dec 2012 15:10:00 +0000</pubDate>
		<dc:creator>C. Liam Brown</dc:creator>
				<category><![CDATA[Links]]></category>

		<guid isPermaLink="false">http://popphysics.com/?p=611</guid>
		<description><![CDATA[Ok, I really should be getting on with the chapter on Energy, but I just had to post this. Voyager 1, a space probe the size of a small car, will soon become the first human-made object to leave our solar system. Launched in 1977, it is still &#8211; amazingly &#8211; sending back new data [...]]]></description>
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