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New videos from Khan Academy 2018-07-12T22:11:16.574658
Actualizado: hace 28 mins 55 segs

Example free response question from AP macroeconomics

Mar, 2018-05-15 20:46
This video walks you through the concepts covered on an AP Macroeconomics Free Response Question. AP(R) Macroeconomics on Khan Academy: Macroeconomics is all about how an entire nation’s performance is determined and improved over time. Learn how factors like unemployment, inflation, interest rates, economic growth and recession are caused and how they affect individuals and society as a whole. We hit the traditional topics from an AP Macroeconomics course, including basic economic concepts, economic indicators, and the business cycle, national income and price determination, the financial sector, the long-run consequences of stabilization policies, and international trade and finance. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything https://www.youtube.com/subscription_center?add_user=khanacademy

Introduction to experimental design

Lun, 2018-05-14 15:47
Introduction to experiment design. Creating a hypothesis. Double-blind testing. Placebo effect.

Pedigree for determining probability of exhibiting sex linked recessive trait

Lun, 2018-05-14 15:47
Pedigree for determining probability of exhibiting sex linked recessive trait

Example punnet square for sex-linked recessive trait

Lun, 2018-05-14 15:47
Example punnet square for sex-linked recessive trait

Example identifying roles in a food web

Lun, 2018-05-14 15:46
Example identifying roles in a food web

Introduction to genetic engineering

Lun, 2018-05-14 15:46
Introduction to genetic engineering. Human breeding. Recombinant DNA. Bioethics.

Asexual and sexual reproduction

Lun, 2018-05-14 15:46
Binary fission, budding, mitosis, fragmentation, parthenogenesis and sexual reproduction.

Pablo Picasso and the new language of Cubism

Sáb, 2018-05-12 18:41
Pablo Picasso, The Guitarist, 1910, oil on canvas, 100 x 73 cm (Centre Pompidou, Paris). Speakers: Dr. Steven Zucker and Dr. Beth Harris

What I do and how much I make

Sáb, 2018-05-12 00:26
Carlos explains sequential art and shares his responsibilities and salary as creative director of Prime Vice Studios.

How I got my job and where I'm going

Sáb, 2018-05-12 00:26
Carlos shares his journey to become a sequential artist and open his own company, Prime Vice Studios.

What I do and where I'm going

Sáb, 2018-05-12 00:26
Ananya shares the mission of the Sid Foundation, the challenges of building a nonprofit, and her goals for the future.

Cuneiform Tablets

Jue, 2018-05-10 18:03
Near Eastern Languages and Cultures graduate student Sara Brumfield recounts her experience working at the UCLA Library's Center for Primary Research and Training, where she described and translated two collections of cuneiform tablets.

Full wave rectifiers

Jue, 2018-05-10 04:00
Half-wave rectifiers only keep the circuit on for half the time. To get more output we need a full wave rectifier In this video, let's see how we can build a full wave rectifier with just 2 diodes.

The PN junction

Jue, 2018-05-10 04:00
A P-type has a lot of holes and an N-type lot of electrons. What if we put them together? In this video, let's explore the famous PN junction. We will see what happens when we have a single crystal with a P-type semiconductor on one side and an N-type on the other. 

Minority charge carriers in extrinsic semiconductors

Jue, 2018-05-10 04:00
When we add impurities to semiconductors, what happens to minority charge carriers? Do they remain the same? In this video, we will explore what happens to minority charge carriers in an extrinsic (doped) semiconductor.

Extrinsic semiconductors P-type

Jue, 2018-05-10 04:00
In this video, we will explore the P-type semiconductors. 

Forward biasing a PN junction

Jue, 2018-05-10 04:00
What happens if we put a voltage across a PN junction? In this video, we will attach metallic contacts at the end of the PN and provide a voltage across it. When we connect P side to Positive and N side to negative, we call it forward biasing. 

Intro to semiconductors

Jue, 2018-05-10 04:00
Why are we obsessed with semiconductors? All our computers and digital devices are made from semiconductors. But what is so special about them? Why do we use them? In this video let's explore, what it is about semiconductors, that allows us to create all these awesome computing devices. 

Zener diode & Zener breakdown

Jue, 2018-05-10 04:00
Heavily doped diodes can undergo a different kind of breakdown. In this video let's explore what happens in a very heavily doped diode. The mechanism was first discovered by a man named Zener. So this mechanism is also called, Zener breakdown and the diodes are called Zener diodes. It's a quantum mechanical effect.

Zener diode voltage regulator

Jue, 2018-05-10 04:00
A Zener diode can limit the voltage across it, making it a voltage regulator! In this video, let's explore how a Zener diode can be used to regulate voltage. We are going use it's reverse breakdown characteristics.

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