比克曼科学世界 第二季(1993)

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Plot Summary:In response to a curious viewer in Missouri, Beakman begins his second season with an explanation of how submarines work. Noting that they can be over six hundred feet long, Beakman explains that subs operate by controlling their buoyancy, changing their density by taking on water which allows them to rise and sink in water. After demonstrating the different densities of wood, coins and water, he then goes on to make a simple homemade submarine, using a plastic soda bottle, a balloon, some rubber tubing, straws, tape, coins and rubber bands. In the \"Beakman Challenge,\" Beakman reveals that the ball in the back of the throat is called the uvula, and that the windiest spot on earth is in Antarctica. After challenging Lester to push a skewer through a balloon without breaking it, Beakman shows that, by pushing it through the ends of the balloon, it can be done without causing a puncture. Asked about why people regurgitate, Beakman takes the opportunity to first explain digestion. Then, using a blender for a stomach, he constructs a simple model of the digestive tract to show how food is digested, before demonstrating how, acting in reverse, it can be vomited, too. Finally, Beakman explains that the growling noises made by the stomach, or borborygmi, are caused by liquid food being pushed through the intestines.