When you’re driving a car down a road, you might get a bit stuffy and decide to roll your windows down. The air will flow in, the wind will get louder, and the sensation of moving will intensify. Your engine will start working a bit harder–and louder–to maintain the same speed. Every sensation will tell you that you’re moving faster, but lowering the window has increased your car’s air resistance, and you’re actually going slower. Or at minimum you’re using more fuel to maintain...
