Mark Zuckerberg on Taking Risks and Finding Talented People

Which shape matches all three clues? So here we have three clues, and we want to see which shape down below matches all three of these statements. So let’s start with the first clue. The first clue says the shape is a quadrilateral; “quad” meaning four-s…

Just press play, you mean? [Voiceover] Yeah, go for it. Whoa! [Music] Now, you may have seen a Ruben’s tube before. That’s basically a pipe with a bunch of holes in it, and you pump in a flammable gas and light it on fire, so you basically create a row …

We are told a phone sells for six hundred dollars and loses 25% of its value per year. Write a function that gives the phone’s value ( v(t) ) so value is a function of time ( t ) years after it is sold. So pause this video and have a go of that before we …

[Applause] Now I’ve been around Sydney and I’ve asked people what causes the phases of the moon, and you know what they say? How do we get the faces of the Moon? Uh, because of the Earth blocks the light that comes from the Sun. A full moon is basically w…

When you look at a rain forest ecosystem like this, one of the obvious questions may be: where do these plants come from? How do they grow? They’re growing all the time, getting larger and larger and larger. Where does that mass, where does that matter co…

Don’t steal from my store. Recent violent attacks in Santa Monica and a growing homeless population have shaken neighbors and businesses. A series of high-profile crimes over the past several weeks became part of a showdown between the city and businesse…