Safari Live - Day 129 | National Geographic

In chemistry, we’re going to see situations where a molecule, an entire molecule itself, might be neutral. But because of the differences in electronegativities and how the molecules are structured, you might have a partially positive charge on one side a…

Two people attend a house party, where they socialize with the same guests, drink from the same beer tap, and are exposed to the same music and atmosphere. They decide to share a taxi and drive home when the party is over as they live closely together. “…

[Music] Well, definitely. I mean, it’s all, he’s been part of what I’ve known, what I’ve done, so I guess so. You usually attach to what you know, where you come from. I was born in South Georgia, sub-Antarctic island, but my family’s been sailing here f…

Hi everyone, Sal Khan here from Khan Academy. Welcome to the Homeroom live stream. We’re very excited to have a conversation with U.S. Secretary of Education Miguel Cardona today. But before we jump into that conversation, I will remind you a few of my ty…

Let’s say I wanted to figure out what negative 2 plus negative 4 is equal to. There are a bunch of ways of thinking about them, but what we’re going to do in this video is think about it using something called integer chips. So, with integer chips, if I …

Aluminum metal can be recycled from scrap metal by melting the metal to evaporate impurities. Calculate the amount of heat needed to purify one mole of aluminum originally at 298 Kelvin by melting it. The melting point of aluminum is 933 Kelvin. The molar…