# 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?

### Understanding the Empirical Formula in Chemistry

### The Most Expensive Metal in the World Isn't Gold or Platinum

### Delta-8 vs. Delta-9: Comparing Types of THC

### 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

### What Is the Associative Property of Mathematics?

### What Is a Linear Pair of Angles in Geometry?

### How to Find the Area of a Triangle

### 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 2

"Delta 8" has become a bit of a buzzword in the cannabis industry and the community health sphere. But what exactly is delta-8, and how is it different from "regular" cannabis?

By Sascha Bos

A number line is a pictorial representation of real numbers. It is most commonly used in elementary math classes to help students compare numbers and perform arithmetic operations like addition, subtraction, division and multiplication.

By Mitch Ryan

Mean, median, mode and sometimes range, are all different methods for finding probability distribution in statistics. Range can be a helpful yardstick when calculating data values that are close together, but it can quickly become confusing if there is a wide gap between the smallest value and the largest number.

By Mitch Ryan

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In chemistry, the classification of substances into acids and bases is fundamental.

By Marie Look

In the history of atomic research, few stories are as gripping or cautionary as that of the demon core, a plutonium sphere designed for one of history's most devastating weapons. This tale not only encapsulates the highest point of atomic ambition but also serves as a somber reminder of the human cost associated with such power.

In the world of chemistry, understanding the difference between strong acids and weak acids is fundamental for both students and professionals alike. Strong acids are known for their ability to completely dissociate in water, making them a pivotal topic in chemical reactions and laboratory experiments.

As a child, when trying to come up with the biggest number possible, you might have said "infinity plus one." While technically infinity is the largest number because you cannot run out of numbers, the biggest numbers that we know of are still difficult to count but a bit more quantifiable.

By Yara Simón

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Flame colors span a spectrum that tells a tale as old as fire itself. Many people wonder what color is the hottest flame; more than a testament to the natural fascination with fire's beauty, this question underscores a fundamental principle in the science of thermodynamics and combustion.

Do you need to calculate the rate at which something changes over time? Whether it's the change in the x-value over the change in the y-value of a line on a graph, or the distance travelled by a car over the course of an hour-long drive, you'll need a rate of change formula.

By Sascha Bos

Physicists use the displacement formula to find an object's change in position. It sounds simple, but calculating displacement can quickly get complicated.

By Sascha Bos

In nuclear physics, the concept of half-life plays a crucial role in understanding the decay of radioactive substances. Scientists use the half-life formula in other disciplines to predict the rate of decay, as well as measure the age of ancient artifacts through carbon dating.

By Yara Simón

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Frequency is a fundamental concept when you're talking about waves, whether that means electromagnetic waves like radio waves and visible light, or mechanical vibrations like sound waves.

By Marie Look

The wavelength formula is a fundamental concept in physics, particularly in the study of waves and electromagnetic radiation.

By Yara Simón

In math, few skills are as practical as knowing how to do long division. It's the art of breaking down complex problems into manageable steps, making it an essential tool for students and adults alike.

We get it: You need help with the parabola equation because those graphs won't draw themselves. Here's how to draw a parabola from an equation.

By Yara Simón

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Trying to figure out whether your research problem would benefit from qualitative vs. quantitative data? Learn about the differences and uses of each.

By Yara Simón

Distinguishing between discrete vs. continuous data and situations that call for each data type is important in ensuring you get your desired results.

By Marie Look

The iconic "school bus yellow" was the invention of an educator named Frank Cyr. But if yellow is so good for visibility, why don't all fire trucks use it too?

By Dave Roos

All bubbles pop — that's a fact of life. But what's the science behind the short life and inevitable pop of a bubble?

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The Standard Model of physics provides a framework for the subatomic world of all energies. Could a possible newfound carrier boson expand the definition of that framework?

By Mark Mancini

Whether you're a math whiz or not, there are some pretty cool number theories, beliefs and coincidences to appreciate. How down with digits are you?

By Alia Hoyt

You've probably had ice stick to your hand when you pull it out of the ice maker. But why is that?

By Alia Hoyt

It’s the ultimate cheat sheet for science class — and it’s right there hanging on the wall. What do you really know about the indispensable periodic table of elements?

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The scutoid is kind of like the Higgs boson. Researchers theorized the new shape existed. And then they went looking for it.

It’s true: In 6 easy steps, you too can draw an impossible shape.