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Beakman's World: Different Densities
Beakman explains density by weighing out different volumes of different items. He then shows how a balloon filled with helium is less dense than one filled with our own air so therefore it rises. -
Crash Course: Biology: Water Density & Heat Capacity
Hank explains why solid water is less dense than liquid water even though solids are typically more dense than liquids. He also discusses how the high heat capacity of water helps support life on Earth. He uses the bodily process of sweating to exemplify water's unique properties. -
Beakman's World: Tricks with Density
Beakman plays a trick on Lester where he labels one egg "F" to indicate that it will float and labels another egg "S" to indicate that it will sink. He then places them in two beakers of water. Beakman explains that he put sugar in one beaker of water so that the egg labeled "F" is now less dense than the water with sugar in it. -
Beakman's World: Air Density
Beakman creates a paper spiral that hangs over a lamp and heats the air by turning the lamp on. When this happens, the hot air is less dense and starts to rise causing the spiral to spin. -
Boy Meets World: Air Pollution Presentation
Cory and Shawn present their report on air pollution, in which they contend that the air density affects the performance of baseball teams during home games. This is because the air density affects the speed at which the ball travels through the air. They use the Colorado Rockies and the Philadelphia Phillies as examples: The Rockies average four more home runs per game because Colorado's air is much cleaner than Philadelphia's. -
Sign in or create an account to view this clipBeakman's World: The Weight of Gas
04:31
Beakman weighs a slightly deflated basketball, pumps it up with air, and weighs it again to prove that air has weight. He explains that different gases have different densities, and to demonstrate this, he uses two shopping bags hanging from opposite ends of a suspended stick. He uses a pitcher to collect CO2 gas coming off of dry ice. When he pours the CO2 into one of the shopping bags, that bag's side of the balance goes down, illustrating that CO2 is denser than air and that different gases have different densities. -
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Sign in or create an account to view this clipRaiders of the Lost Ark: Throw Me the Idol
02:28
In an attempt to collect the Golden Idol, Indiana takes the idol and replaces it with a bag of sand the same size. That doesn't work, as the traps still activate, and Jones needs to escape quickly or meet his fate. -
Sign in or create an account to view this clipBeakman's World: Sink or Float
04:17
Beakman demonstrates that marshmallows are less dense than the same amount of water and therefore, marshmallows float. Nails are heavier than the same amount of water so they sink. He then explains water displacement by getting into a tank of water. His DIY demo for this is making a aluminium boat that floats in a bowl of water but when you crush the aluminum foil into a square, it sinks because it couldnt' displace the water. -
Sign in or create an account to view this clipGalileo: On the Shoulders of Giants: Sink or Float
02:00
Water's density is 1 g/cm3. When an object with a lower density than this enters water, it floats because its downward force is weaker than the upward force exerted by the water.
