Brand New Key - Briley the One Girl Band

[Voiceover] So we saw in previous videos that a ball of mass m rotating in a circle of radius r at a speed v has what we call angular momentum, and the symbol we use for angular momentum is a capital L. The amount of angular momentum that it would have wo…

Hi everyone, Sal here from Khan Academy. Welcome to the Homeroom live stream! Today, we’re going to be doing an ask me anything about anything. So, if you have your questions, start to put them in the message boards underneath this video on Facebook or Y…

In previous videos, we started talking about the idea of transformations. In particular, we talked about rigid transformations. So, for example, you can shift something; this would be a translation. So the thing that I’m moving around is a translation of…

Hi everyone, Sal here from Khan Academy. Welcome, uh, again for joining our homeroom live stream. Uh, before we get into what’s going to be a really fun conversation with some internal Khan Academy team members to talk about all the new things we have for…

Earlier in your algebraic careers, you learned how to multiply polynomials. So, for example, if we had (x + 2) times (4x + 5), we learned that this is the same thing as really doing the distributive property twice. You could multiply (x) times (4x) to ge…

What we’re going to do in this video is start to compare distributions. So for example, here we have two distributions that show the various temperatures different cities get during the month of January. This is the distribution for Portland; for example,…