Physical Science
Physical science is the study of the physical world around you. Learn about everything from electricity to magnetism in this section.
Brown Noise vs. White Noise: Which Is Best for Quality Sleep?
Can a sound wave kill you?
Can two cans and a string really be used to talk over a distance?
Strong Bases: Properties, Applications and Examples
Comparing Strong Acids and Weak Acids
What Color Is the Hottest Flame?
How Electricity Works
How Faraday Cages Work
How Gasoline Works
What do bugs have to do with forensic science?
5 Things You Didn't Know About Autopsies
Do a Person’s Fingerprints Change After Death?
How Alchemy Paved the Way for Chemistry
How did Nikola Tesla change the way we use energy?
Time May Not Exist, Say Some Physicists and Philosophers
Why Does Ice Stick to Your Fingers?
What if I forgot to remove a piercing before an MRI?
A Kid-friendly Introduction to Magnets and Magnetism
Mean, Median, Mode: 3 Different Measures of Central Tendency
What Is the Biggest Number? 6 Astronomical Contenders
How to Use the Rate of Change Formula in Math and Physics
5 Hugely Fun Facts About Mass (Not Weight)
Antarctica's Spooky Cosmic Rays Might Shatter Physics As We Know It
Entropy: The Invisible Force That Brings Disorder to the Universe
The Demon Core: A Tale of Atomic Ambition and Tragic Fate
Half-Life Formula: Components and Applications
Could an 'X17 Particle' Hint at a Fifth Force in the Universe?
Why Are School Buses Yellow?
HowStuffWorks: How To Draw An Impossible Shape
What Are the Colors in the Visible Spectrum?
Learn More / Page 8
Thanks to the Faraday cage, we can control electricity and make it safer for our computers, cars and other inventions.
You want to learn how to read the electric power meter in your home to see if the meter reader sent by the electric company was accurate. This article will teach you how to read a power meter.
Nuclear waste epitomizes the double-edged sword of modern technology. It's a toxic and radioactive byproduct of nuclear medicine, nuclear weapons manufacturing and nuclear power plants.
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You need to make a magnet stronger, but you’re not sure how to do it. Learn about how to make a magnet stronger in this article.
Metallurgy involves studying how metals behave and using that understanding to manipulate and shape them into various forms.
If you're already familiar with subtracting fractions, learning how to add fractions will be a piece of cake for you. And if you haven't learned how to subtract fractions yet, don't worry — we've got you covered!
Denatured alcohol is useful for lots of things, but drinking definitely isn't one of them.
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Diatomic elements are molecules composed of only two atoms, every time, always. There are only seven of them on the entire periodic table.
How do you calculate absurdly high numbers without writing them out in numerals? You use scientific notation. We'll give you examples and show you how.
By Mark Mancini & Yara Simón
Electrons are attracted to some atoms more than others. If two atoms are of equal strength, the electrons will be equally shared. If one atom is stronger, the electrons will be pulled in that atom's direction.
The two different types of alcohol are commonly used in hand sanitizer today. But does one work better than the other?
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A dodecahedron has 12 flat faces, all shaped like pentagons. Here are 12 cool things you just may not know about them.
By Mark Mancini
Corresponding angles are what you get when two parallel lines are crossed by a third line, creating angles that have the same relative position at each intersection. They're easy to find once you know what to look for.
We may think the butterfly effect means that a small change (like the flap of a butterfly's wings) can have huge consequences (a tornado in China). But what if it means the opposite?
It isn't magic but instead science that causes the bottled water to completely freeze — and some pretty simple science at that. So, how long does it take water to freeze?
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Venn diagrams are an easy way to simplify information and visualize relationships between concepts or sets of data.
Don't know your fool's gold from the real deal? We'll tell you how to tell what's pyrite (aka fool's gold) and the good ol' 24 karat stuff you want.
By Mark Mancini
Tungsten's hardness and heat resistance make it a must for products like rocket engine nozzles, armor-piercing bullets and even the humble light bulb filament. In fact, pure tungsten boils at 10,030 F, the same as the photosphere of the sun.
By Dave Roos
You might wonder what phosphates do, but they are so intrinsic to our daily lives that the question really is: What don't phosphates do?
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It's easy to make a Mobius strip with some paper and tape, but your mind will be blown by the mathematical concepts it unlocks.
Two lines that are perpendicular to the same line are parallel to each other and will never intersect.
By Mark Mancini
The seriously ambitious experiment aims to understand the mysterious neutrino and maybe even figure out why matter won out over antimatter during the Big Bang.
A reinterpretation of an ancient Babylonian tablet shows that trigonometry might be 1,000 years older than thought. But there's some disagreement.
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If you're one of those people who chooses invisibility as your desired superpower, it could mean you have a dark side.
By Alia Hoyt
Scientists have figured out why some objects stick more to each other. And it's a very cool trick.
By Alia Hoyt