Tag Archives: forces

How to Run on the Moon

In the future I'm sure there will be a city on the moon. We know how to get there, it's super close, and it could be great for further space exploration. However, there's a problem with living on the moon for any length of time: the weak gravitational field, which …

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The Quest to Map the Inside of the Proton

The original version of this story appeared in Quanta Magazine. Physicists have begun to explore the proton as if it were a subatomic planet. Cutaway maps display newfound details of the particle’s interior. The proton’s core features pressures more intense than in any other known form of matter. Halfway to …

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Why Is Our Solar System Flat?

Some of my favorite things to look for in the night sky (besides the International Space Station) are the planets. If you need help finding them, I recommend Heavens-Above. It's a website where you can enter your location and it will show you what's currently visible in your area. But …

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Why the Polar Vortex Is Bad for Balloon Artists

It's been crazy cold this week, even down where I live in Louisiana, thanks to an outbreak of a polar vortex. This frigid air is bad for all kinds of things, including football helmets, apparently. But it's actually a great time to demonstrate one of the basic ideas in science: …

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How to Measure the Impact From a Collision

A batter hits a baseball, NASCAR has a 21-car crash, or maybe Thor punches the Hulk. When one object collides with another, we can describe the interaction with an impact force. But putting a specific number on that force is actually quite difficult.Let’s go over some methods we can use …

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Could a Cockroach Survive a Fall From Space?

I saw this post on Reddit: Would a cockroach survive a fall from the stratosphere? Oh, what a lovely question. But why stop there? The stratosphere only goes up 50 kilometers—what about a cockroach falling from outer space? Space starts at the Kármán line, which is 100 kilometers up (or …

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The Physics of Faraday Cages

The world relies on electromagnetic waves for communications: Wi-Fi, Bluetooth, 5G, even radio waves. But suppose you want to prevent a device from communicating—or interfering—with the rest of the world. You can't block EM waves, but you can cancel them by surrounding the device with an electrically conducting material. We …

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