Thursday, 9 February, 2012

That depends on conditions. “Today’s cars are designed to be very aerodynamic,” says Glenn Bower, a senior scientist at the Engine Research Center at UW-Madison. “They ‘cut’ through the air at moderate speeds. At lower speed, stopping and starting dominate the vehicle’s energy consumption, while at highway speed (45 to 65 mph) most of the [...]

Hybrid cars and plug-in hybrids boost auto efficiency and reduce pollution, but it’s a long struggle from the idea to the reality.

“Technically, there is no surface of the Sun,” says UW-Madison’s Sanjay Limaye. The senior scientist and educator with the Space Science and Engineering Center explains that unlike the hard, physical boundary here on Earth, the Sun’s surface is a hot mass of gas that is more or less continuous with its atmosphere. “The Sun is [...]