# 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?

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

### Strong Bases: Properties, Applications and Examples

### Comparing Strong Acids and Weak Acids

### 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

### Using Synthetic Division to Save Time in Calculus and Algebra

### Breaking Down the Arc Length Formula

### Interquartile Range: How to Calculate and Visualize IQR

### 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

In algebra and calculus, a polynomial function is used to chart out graphs and waves with much more complexity than a simple linear factor. Polynomial division is sometimes required to factor them, and cut them up into chunks that we humans can better understand.

By Talon Homer

Arcs are an important aspect of geometry, physics, trigonometry and design work. However, curved lines are much more difficult to measure than straight lines, which is why it's important to familiarize yourself with the arc length formula.

By Talon Homer

The interquartile range (IQR) is a statistical measure of the middle values of a sample data set that is separated into four equal parts. This middle-value grouping can provide a median range between the upper half and lower half of the data you've collected, allowing you to ignore extreme values.

By Mitch Ryan

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The mnemonic device SOHCAHTOA helps budding mathematicians remember the trigonometric functions sine (sin), cosine (cos) and tangent (tan), which they need to solve for triangles' missing sides and angles.

By Marie Look

When you're dealing with exponents, numbers can get very big (or very small) very quickly. Therefore, it's helpful to have some short cuts.

By Zach Taras

Absolute value is a mathematical concept often used in conjunction with a number line or graph to represent the relative value from zero (modulus). To illustrate this idea in a different way, the absolute value of a number can be closely related to distance in the physical world.

By Mitch Ryan

A coordinate plane is a mathematical, two-dimensional plane formed by two number lines. A horizontal number line and a vertical number line intersect to form two axes (plural for axis), and a grid system comprised of four quadrants.

By Mitch Ryan

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The concept of place values is fundamental to mathematics and the number system, particularly when you're dealing with whole numbers and decimal numbers. A place value chart is an essential tool that can help students visualize the position of each digit in a number and understand its actual value within the context of the number.

By Marie Look

You've probably seen supplementary angles examples in your everyday life without knowing it. Whether you pass a leaning sign on a flat highway or walk by a shed with a lean-to roof — whenever two angles combine to form a straight, linear pair, there they are.

By Mitch Ryan

Mathematicians use something called interval notation to convey information about a range of values in a way that's clear and easy to understand. This form of writing is necessary because intervals are common concepts in calculus, algebra and statistics.

By Marie Look

Fundamental trigonometric identities, aka trig identities or trigo identities, are equations involving trigonometric functions that hold true for any value you substitute into their variables.

By Marie Look

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Algebra is the branch of mathematics that focuses on formulas, and one of its key concepts is the representation of linear equations, which describe straight lines.

By Marie Look

Whether you're studying up for a math test, helping your child with homework or just trying to brush up before trivia night, learning the basic ins and outs of polygons will serve you well.

By Mitch Ryan

A rhombus is a parallelogram shape with two pairs of parallel sides and four equal sides. These four sides of equal length also define the rhombus as an equilateral quadrilateral. Etymologically, the name of this shape stems from the Greek word "rhombos," which roughly translates to "spinning top."

By Mitch Ryan

Greater than, less than, equal to: These terms are mathematical expressions that allow the user to compare two numbers or equations. Once you've become familiar with these terms — and the symbols used to represent them — you'll be able to apply them to various math problems.

By Zach Taras

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As you might recall from math class, fractions and decimals are two different ways of representing the same thing. A third option, percentages, is a close cousin of decimals. However, making use of this knowledge requires knowing how to convert one into the other.

By Zach Taras

"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