[RWebb]

OK, let's see how you do -- if you know the source please don't post it for a few days.

1. If you hold your hand out the window while riding in a car (carefully!), you feel more drag if you hold your hand perpendicular to the ground compared to parallel to the ground. Why?

2. In Nascar’s “old car” — the one used before the Car of Tomorrow being introduced this season at Daytona — the fenders on the left-hand side of the car were much broader than on the right-hand side of the car. If the air on both sides of the car had the same pressure, what would the advantage be of having broader fenders?

3. When you place a tire pressure gauge on your tire and measure a number like 30 psi, that’s not the actual air pressure in your tire. What is the actual air pressure in your tire?

4. The temperature of the water in your radiator can actually get above 212 degrees Fahrenheit. Normally, water boils at 212 degrees, so how can this happen?

5. How much does the air inside the Unisphere weigh? The Unisphere is a model of the Earth made of a grid of stainless steel tubes, open to the air, with continents in solid stainless; diameter of the sphere itself is 120 feet, or 36.57 meters.