Safari Live - Day 42 | National Geographic

Hello and welcome to Khan Academy live SAT. I’m Eric, I’m an SAT tutor and one of the SAT experts here at Khan Academy, and I’m so excited to be with you today and over the course of the next few weeks as we cover SAT Math, reading, and writing with one c…

Let’s look at the heating curve for water. A heating curve has temperature on the y-axis, in this case, we have it in degrees Celsius, and heat added on the x-axis; let’s say it’s in kilojoules. Let’s say we have 18.0 grams of ice, and our goal is to cal…

So let’s say I have two functions that are the inverse of each other. So I have f of x, and then I also have g of x, which is equal to the inverse of f of x, and f of x would be the inverse of g of x as well. If the notion of an inverse function is comple…

Black holes are one of the strangest things in existence. They don’t seem to make any sense at all. Where do they come from… and what happens if you fall into one? Stars are incredibly massive collections of mostly hydrogen atoms that collapsed from enor…

I was the first scientist to go into the cave. Once the actual remains had been discovered, I looked down and just thought, “Oh really, I may perhaps have bitten off more than I can chew.” But you know, at the same time, the excitement of what we were abo…

[music playing] OK, you’re good, Cara. You know the bit I said about gravity doing the first bit? Yeah. That’s wrong. You’re just going to have to muscle it out most of the way. Oh, no. Hopefully, I’ll get across before I get scared. That’s what I’m hop…