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For optimal performance, all the components of a race care must be balanced. Getting the right balance is hard because the weight of the fuel changes and the tires wear during the race. Crew chiefs make sure the cars are ready to race through the application of scientific principles. Part of "The Science of Speed" series.
(Source: DCMP)
Race cars are loud. They don't have mufflers because mufflers will reduce the speed of the car. Spectators need to make sure they have adequate ear protection if they attend a NASCAR race. Part of "The Science of Speed" series.
From cyclists to race cars, the motion of an object is determined by the sum of the forces acting on it. An aeronautics engineer works with Newton's three laws of motion to test the best bicycle posture and helmet in a wind tunnel.
It takes more than ten thousand pounds of force to get a race car around the turns of the race track. The tires are essential in distributing this force and keeping the car on the track and out of the wall. Part of "The Science of Speed" series.
The engine's job is to convert the energy in fuel to speed. With the application of scientific principles, NASCAR mechanics have discovered ways to quickly and efficiently get the race cars the speed they need to compete. Part of "The Science of Speed" series.
In 2008, NASCAR driver Michael McDowell lost control of his car and hit the wall at 170 mph. Fortunately, McDowell was able to walk away from the accident, which is a testament to the safety elements NASCAR has instituted. NASCAR officials apply the scientific principle of the conservation of energy to strengthen their safety measures. Part of "The Science of Speed" series.
Speed, elegance, comfort, and many other factors are taken into account when creating a car. Car designers must be intentional in the creation of a great vehicle and ensure that all parts work together. Sports cars must have powerful engines, excellent chassis, strong suspension systems, and fuel efficient systems. Automotive technology ensures that consumers get more than just a pretty car.
Grip is the frictional force that holds the tires on the track, and NASCAR mechanics are always looking for ways to increase the grip of tires. The cars have less grip as their speed increases, and mechanics must understand the relationship between speed and grip to ensure the race car is able to perform safely at high rates of speed. Part of "The Science of Speed" series.
First in a three-part series exploring the history of race perceptions and behaviors towards races in the United States. Explores how recent scientific discoveries have toppled the concept of biological race. Follows a dozen high school students who sequence and compare their own mitochondrial DNA looking for a "race marker," with surprising results. Also looks at the history of racism in the United States, the advent of stereotypes based on physical attributes attributed to races, and somatotypes, with particular reference to African Americans.
Did you know that cars can be recycled. In this episode, Joel witnesses the massive power of the car crusher and learns how the different parts of cars can be reused. Part of the Curiosity Quest Series.
Hanna and Olli race to get to a distant island. They have a choice between a motorboat and a sailboat. Hanna chooses the motorboat and leaves Olli with the sailboat. Who will win the race? They both learn important lessons about energy and natural resources. Part of the "My Little Planet" series.
Using only gasoline to power cars back in 1905 was cheaper and easier, so the hybrid car was forgotten-until recently. The modern hybrid car has two distinct power sources working together to make it run: gas and electric power. Since the fuel widely used now is a non-renewable resource and becoming increasingly less affordable, the hybrid car is making a comeback. The benefit of the hybrid is that instead of running on gas, it uses non-polluting electric power when possible. Also, it helps cut pollution and saves drivers money at the gas pump.
Meet Boss – the car that can drive itself. Boss is the invention of Carnegie Mellon researcher Raj Rajkumar and his team. It has 18 sensors, including a three dimensional laser and onboard computers that connect to GPS and mapping software. When it comes to knowing the rules of the road, Boss rarely makes a mistake. With support from the National Science Foundation, it was built for a Department of Defense competition called the DARPA Urban Challenge. Boss negotiated the roads, including traffic, and was the hands down winner in 2007.
Dorothy Vaughan, Mary Jackson, Katherine Johnson, and Christine Darden were good at math. They participated in some of NASA's greatest successes, like providing the calculations for America's first journeys into space. This title explores the story of four female African-American mathematicians as they overcame gender and racial barriers to succeed in a highly challenging career. Based on the children's book by Margot Lee Shetterly.
Engine power is constrained at superspeedways like Daytona and Talladega, which reduces the speed of the cars. Teams use aerodynamics to gain an advantage due to the constraints. They adjust the cars to minimize drag, and driver's use the technique of drafting. Part of "The Science of Speed" series.
The parakeet starts with a monologue about games and sports. The first guest, the turtle is very concerned that the tradition of the annual race of the turtle and the hare, or hare relatives, may be lost if the race is not done this year. The rabbit doesn't want to race because last year he lost, and the turtle rubbed on his face the whole year. The fleas present a documentary about how important it is for humans to win. The celebrity guest, a tropical pop singer who likes flowers, tells us how he felt every time he was nominated for an award winning musical but didn't win.
This decade is best remembered for disco and Watergate. But the inventions in the 1970s mark the beginning of the digital age to come. Featured inventions include: cell phones, the bomb disposal robot, Post It Note, hybrid cars, and digital cameras.
For centuries, land travel was restricted to how fast and far humans or animals could walk. In the 19th century, the invention of the bicycle transferred human energy to a set of wheels. During the Industrial Revolution, the invention of the steam engine led to the railroad, a change in transportation that created the tourist industry. In the early 20th century, the invention of the automobile forever changed how humans travel, and with the assembly line, Henry Ford forever changed how goods are manufactured.
What is the future of human presence in space? How might things be different if there had not been a Cold War and a Space Race? What does humanity gain by venturing into the solar system? Three events are key moments in the conquest of space: the R-7 rocket launches the first satellite into space, President Kennedy's speech announces the United States race to the moon, and Neil Armstrong walks on the moon. Part of the "Butterfly Effect" series.
The marine reptiles Ichthyosaurs arose after the Great Dying, which wiped out at least 90 percent of life in the oceans. This event changed the seas forever and triggered a new evolutionary arms race between predator and prey. Part of the “Eons” series.
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