This is something I’ve been wondering about since 8th grade, and I think I’ve finally found the proper forum to finally get some answers. When smoking a cigarette in the car, the blue-gray whisps of smoke almost always seem to be sucked right out the window. It seems to be especially true the faster you’re driving. How is it that the smoke gets sucked out?
Probably an instance of Bernoulli’s Principle. The air is moving by the windows at a high speed causing a low pressure area that sucks the air out of the car. Air is probably entering the car through the vents at the same time.
Thank you!