Satya Nadella on the journey to becoming Microsoft's CEO & reimagining technology's impact

We are told to use estimation to tell whether each estimated quotient is reasonable or unreasonable. So we have a bunch of estimated quotients here. Someone is estimating that 2419 divided by 3 is roughly equal to 7500. We have to figure out is that reaso…

I started when I was 23 years old, working for a jet broker in Washington DC. In those days, it was maybe six or seven jet brokers in the United States. I don’t think there were any outside the United States at the time. It was really in the beginning of …

If you’ve ever thought, “What if I just dug a really, really deep hole?”, that’s what the USSR did right here! That hole is deeper than the deepest part of the ocean. It’s deeper than Mount Everest is tall. They started digging it in the 1970s as part of …

The concept of entropy is related to the idea of microstates. To think about microstates, let’s consider one mole of an ideal gas. Remember, n represents moles at a specific pressure, volume, and temperature. If the system of gas particles is at equilibri…

We’re told an athlete takes a deep breath, inhaling 1.85 liters of air at 21 degrees Celsius and 754 millimeters of mercury. How many moles of air are in the breath? How many molecules? So pause this video and see if you can figure this out on your own. …

Hi everyone! Welcome to our homeroom live stream. Sal here from Khan Academy. Uh, before we get into, uh, our guest, who is me today, it’s just going to be an ask me anything type of thing. So actually start putting your questions on Facebook and YouTube…