Bernoulli’s principle: Supercells & Airplanes
Bernoulli’s principle: Supercells & Airplanes

 In strong supercell thunderstorms, wind moves upwards at over 90mph. Fast-moving air creates an area of low pressure, or a partial vacuum. Nature abhors a vacuum, so nearby air rushes in to join the updraft. This skyward flow can be powerful enough to suspend grapefruit-sized hail. The tendency of a speeding air current to

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The Slinky: Mystery of a Childhood Toy
The Slinky: Mystery of a Childhood Toy

Everyone loves a Slinky, especially scientists! Most people know them as cool springy things that can go down the stairs or end up in a giant tangled mess. We want to focus on something else: what happens when you dangle a slinky from the top until it is fully extended, then drop it?  You might

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Why on Earth Can Oranges Spray Fire!?
Why on Earth Can Oranges Spray Fire!?

Oranges are fruits that grow on trees. They are made up of almost 90% water by weight. This should pretty clearly mean that they are not flammable. However, there is something going on. Take a look: Inside of the peel is a special oil called D-Limonene that is quite flammable. What reason could an orange

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DIY Optics Experiment
DIY Optics Experiment

Ever tried burning wood or pine needles with a magnifying glass? It works best when you adjust the glass to create a small, bright spot of light. After its 93-million-mile journey to Earth, sunlight isn’t ordinarily hot enough to start a fire, but the magnifying lens focuses a large cross-section of light rays into a

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The Science of Depth Charges
The Science of Depth Charges

Imagine hitting a hanging punching bag. A significant part of the impact travels through the bag, causing it to swing back and forth. Now replace the punching bag with a down pillow. This softer, less dense target absorbs most of the shock instead of transmitting it. The pillow swings a little, but deforms a lot. The

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