Ex-CIA Spy: China Is Preparing & We're Not Paying Attention! Here's What Happens If They Takeover!

The goal of this video is to help us visualize what’s going on with the solution at a microscopic level, really at a molecular level, and also to get practice drawing these types of visualizations because you might be asked to do so depending on the type …

Hi, I’m Sal Khan, founder of the Khan Academy, and I’m Caroline H. Flexer, founder of Duck Duck Moose. We have a very exciting announcement today. As you probably know, Khan Academy is a not-for-profit with a mission of a free, world-class education for …

The wolf is the world’s largest dog—a top predator and an iconic animal that roamed freely across North America for tens of thousands of years. But in the early 20th century, a ruthless war was waged against these cunning carnivores in an effort to stop t…

Karissa: Almost three years ago, my life changed. A powerful EF-5 tornado ripped through Moore, Oklahoma, which, tragically, killed twenty people. That day, my friend Dave Holder, he’s a Meteorologist, and he called me about forty-five minutes after the t…

Hi, I’m Salon, founder of the Khan Academy, and I just wanted to let you know how excited all of us are for what we have in store this coming back to school. First and foremost, this is going to be a big effort in terms of working with teachers and class…

We’re told to consider the complex number ( z ) is equal to negative one plus ( i ) times the square root of three. Find ( z ) to the fourth in polar and rectangular form. So pause this video and see if you can figure that out. All right, now let’s work …