A better way to prepare a water bath is to put your pudding or cheesecake into the roasting pan, place the pan into the oven, and add enough hot water to reach halfway up the pan. Place dirt around the edge of the plastic at the rim of the hole to seal off the still. Drafting comes into play when drivers begin pushing the limits of their cars and the engines but are still looking for more. Topics include the fuel-oil mixture for two-stroke engines and performing other lubrication services. Sometimes, direct injection engines can exhibit the buildup of carbon deposits on the intake valves, which could cause reliability issues. There can be problems with the internal distribution system, or the condenser might be damaged. There are essentially two kinds of drag — friction and pressure. Good drafting can turn a humdrum race into a real humdinger and a bumper-to-bumper slugfest into high-speed chess and produce the kinds of races that are talked about for years afterward. The second car can slip into that disturbed air stream and reap the benefits — that is, if the driver is talented. Good design can stick a race car to the track better and allow it to move faster through the air.

Have your children gross out their friends while discovering that carbon dioxide gas can make heavy objects float. Whether motivated by unadulterated greed (read: the railroad barons of the late 19th century), or for the public good, history has shown that society’s innovators, its dreamers, have always moved the ball forward, leaving the rest of us to follow. Fourdrinier machine: Machine that forms paper from pulp, named after the English brothers who financed its development in the early nineteenth century. Ask the Wright brothers or the astronauts who walked on the moon. Jim Powell, who helped invent the train, told The Verge that Musk is on to something by enclosing the system in a tube. If not, then perhaps the man who put the first privately owned rocket into space will also give the world the Hyperloop. Magnets on the skis, coupled with an electromagnetic pulse, give the pod its initial shove. Musk wrote in his initial Hyperloop report.

Musk says if the walls of the tube and pod are close together, “the capsule will behave like a syringe.” In other words, the pod would push the entire column of air in the system instead of letting it flow past. He said that a system out in the open creates too much drag. Ream out residue from ports. Fuel anxiety: Throughout his flight, Russell expressed concern that he would run out of fuel, or that something was wrong with his plane. Drafting is a game of small numbers and risky strategy playing out in a larger drama. The plan is to design a pod with metal skis that ride, or levitate, on a cushion of air pumped through small holes in the skis. Linear induction motors, which get their juice from magnets and conductors, would be placed at various points along the tube and keep the pod moving fast and steady with little chance of accident. Add equal parts baking soda and salt if you need a little scrubbing action on spills and drips. At speed, downforce can add the equivalent of 1,650 to 1,750 pounds (748 to 794 kilograms) of downforce to the tires.

Although aquariums have limitations, they can be an environment where fish are able to flourish. On smaller tracks with fewer straightaways a car is tuned to have even more downforce to keep it stuck to the pavement and handle the turns better. It also deals with one of the most basic tenets of physics in racing — the faster a car goes, the more effect air will have on it and work to slow it down. But, the basic story is that each car engine has a set number of cylinders that house pistons. ­If you think you can pilot a NASCAR race car around Alabama’s Talladega Superspeedway at 180 miles per hour (290 kilometers per hour) with more than 40 of your closest friends and enemies hot on your tail, you’d better think again. These beverages can cause you to take in too many calories. ­On the next page, we’ll take a closer look at the complex and subtle science of the art of drafting.