Recent content by vsny

I've read (I think it was on slashdot) that using constant velocity cruise control on your car is much more energy efficient than letting your speed vary. To the point where they said you would want to control your speed to much less than 1 kph. What is the general consensus on this? I'm a...

I am not a physicist but for years I was uncomfortable with this concept. No matter how much people said, "well it's a constant: distance/time = c," I was not satisfied. Common phrases such as, "it's based on our unit of measure," or "it's how we define things," did nothing to convince me...