1. It makes sense that air drag increases with speed, but is it a direct increase or to the square of the velocity? (so the faster you go the more energy wasted?) 2. What is the relationship between air temperature, pressure, and air drag? I can see how on a warmer day the molecules are further apart but moving much quicker. Thus less air drag. 3. I asked my professor about some of this last night but he had a bit too many drinks because of our graduation, so he didn't make much sense. However, he explained something interesting about how molecules repel each other (when they come in 'contact'). He explained that if you come closer to the molecule at a low speed, it will be repelled without you losing too much energy. But if you were moving very quick, you'd get much closer to the air molecules and they'd bounce off with a greater speed, hence you'd be experiencing a higher energy loss than you would at lower speeds (because of air drag) Something similar to that I guess.