In this video Paul Andersen explains how the angular momentum of a system can be calculated by determining the angular momentum of all individual objects within the system. An inquiry activity using a gyroscope is also included.

In this video Paul Andersen explains how the electric field strength decreases as the square of the radius as you move away from a point charge, or a uniform distribution of charge on a sphere. This is a direct application of Coulomb's...

In this video Paul Andersen explains how gravitational forces differ from the other three fundamental forces; electromagnetic, strong, and weak. Gravitational forces are always attractive and operate at all scales. Even though...

We've talked about a lot of extreme environments in the solar system, but the sun just might be the MOST extreme! Join SciShow as we dive a little deeper into our friendly neighborhood star.

What is torque? This is one of those things that you may have heard about in passing but never really understood. In this episode of Crash Course Physics, Shini sits down with us to discuss what torque is, how it works, why it works, and...

It's pi day! Hank explains why this irrational number is important to scientists, and discusses a bit of a controversy that surrounds it.

In this video Paul Andersen explains how we can use Coulomb's law to predict the structure of atoms. These predictions can be verified through the use of Photoelectron Spectroscopy (PES). Electron's are help around the nucleus because...

The universe is HUGE. But, there is only so much of the universe we can ACTUALLY see, and if we wanted to measure that FINITE space, how would we do it? A gigantic ruler? One really long car ride? Or maybe it's something even more...

In this episode we talk about dimensions and how we know that we live in 3D (or do we?).

In this video Paul Andersen explains how current moving through a wire will generate a magnetic field tangent to the wire. As the current increases the magnetic field will increase and as the radius from the wire increase the magnitude...

In this video Paul Andersen explains how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. The equation for gravitational field...

A bit of the history behind how we came to use the symbol "pi" to represent what it does today, and how Euler used it to refer to several different circle constants.

How Big Is The Sun?

Did you know that, at a certain point on a moving wheel... there's no motion? I mean, kinda... it's all relative, right? Prepare to have your mind blown in this episode of Crash Course Physics where Shini delves into the world of...

New ReviewLearn how fluid speed changes in a narrowing pipe using laminar flow, the continuity equation, and a clear animation. Perfect for physics students!

New ReviewIn this Grade 7 math lesson, students will learn how to determine the distance between the center of a circle and a point drawn on the circle when the radius is given. We begin by reviewing the definition of a circle’s radius and...

New ReviewThe video explains how to determine the radius of a circle from its general equation (0:00). Brian McLogan demonstrates the process of completing the square to transform the given equation into the standard form of a circle's equation...

New ReviewWhen students are working with circles it seems they always make the same mistakes. In this video I am going to highlight the most common ones students make.

New ReviewLearn how to find the *area of a circle* with simple, step-by-step examples! In this middle school math lesson, Mrs. C from Math Defined explains how to use the formula *A = πr²* to calculate the area of a circle whether you’re given the...

New ReviewIn today’s lesson, we’re learning how to find the Surface Area Of Cylinders — including the total surface area and lateral surface area. We’ll break down the formulas step-by-step, plug in real values, and work through several examples...

In this shorts video we will learn how to find the volume of a cone. We will begin by writing the formula. We will identify the missing variables or dimensions of the cone. Using the provided image we will identify the diameter and...

In this shorts video we will find the radius of a circle using area. We will begin with identifying the formula for finding the area of a circle. We will highlight the given information and rewrite the area formula using the given...

In this shorts video we will find the area of a Valentine's Day Heart. We will be presented with a composite figure, a heart. A composite figure is a figure composed of two or more two-dimensional figures. The heart is formed by a...

In this shorts math video we will answer a standardized math test question where we find the volume of a cylinder using diameter. We will review the Volume formula of a cylinder, V=pi times r square times h. We will review the...