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The Physics of an Inclined Treadmill
Posted by Ethan on March 10, 2010 A bad day for your ego is a great day for your soul. -Jillian Michaels One of the most popular exercises at the gym is the treadmill. And why wouldn’t it be? Whether you’re running or walking, it’s a great way to get your heart rate up, get your body moving, and for many people,…
Is Dark Energy the same as Acceleration?
Posted by Ethan on April 10, 2008 In a comment on my last post, What is Dark Energy, Kendall asks the following, which is such a good one I think it deserves its own post: I thought the expansion was accelerating? Aren’t you saying that it is on its way down to 85% of its current rate? Sounds like expansion is slowing,…
What is Dark Energy?
Posted by Ethan on April 9, 2008 You’ve all heard these words before. Dark Energy. But what is it, and why are we stuck with it? Let me start by telling you a story. Imagine, for a minute, that you have a candle. You know everything about this candle, including how bright it is and how far away it is from you.…
The Universe is Accelerating?
Posted by Ethan on March 12, 2008 Sure, there’s dark energy, but what does that really mean? First off, there’s the bizarre phenomenon we see: very distant objects appear dimmer than we expect in a Universe filled with just matter and space. This supernova (above) should appear much brighter for how distant it is, based on what we know about supernova. This…
