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

Hello and welcome to ED Talks with Khan Academy. I’m Kristin Docero, the Chief Learning Officer at Khan Academy, and I’m excited today to talk to Dr. Matt Townsley, who is a professor and author of Making Grades Matter. We’ll be talking about all things g…

I’m actually gonna use my arm so I can high-five so many people, 106. You’re gonna high-five 106 people? Yeah. Aren’t you gonna get tired? No, because my robo-arm’s going to do all the work. Alex was born without a fully formed arm, a condition that…

Human existence is scary and confusing. A few hundred thousand years ago, we became conscious and found ourselves in a strange place. It was filled with other beings. We could eat some; some could eat us. There was liquid stuff we could drink; things we c…

Okay… Hello. Hey. So, this is good, this is good. You - you’re working, can you see me? I can see you. Do you know what went wrong in-uh.. during the launch..? Yes - it’s not complicated, but, it’s a long chain of events. On August 21, 2014, two satellit…

KATIE COURIC (VOICEOVER): Is shifting before our eyes. Race you to the top, Mike. (VOICEOVER) Big changes– Hi, Henry. HENRY: Hi, Katie. KATIE COURIC (VOICEOVER): –big challenges– I hate to admit it, but I probably am prejudiced. KATIE COURIC (VOICEOV…

Standard cell potential, which is also called standard cell voltage, refers to the voltage of an electrochemical cell when reactants and products are in their standard states at a particular temperature. For a zinc-copper galvanic cell, solid zinc reacts …