Here's a preview of how AC analysis is going to work. To get ready we need to review some of the ideas from trig and complex numbers. Created by Willy McAllister.

We break a sinusoidal input voltage into two complex exponentials. Using superposition, we can recover the complex output signals and reassemble them into a real sinusoidal output voltage. Created by Willy McAllister.

Overview of what the Alternative Minimum Tax is and its purpose. Created by Sal Khan.

In this video David quickly explains each charge and circuit concept and does a sample question for each one. Created by David SantoPietro.

In this video David rapidly explains all the concepts in 1D motion and also quickly solves a sample problem for each concept. Keep an eye on the side scroll see how far along you've made it in the review video. Created by David SantoPietro.

In this video David quickly explains each 2D motion concept and does a quick example problem for each concept. Keep an eye on the scroll to the right to see where you are in the review. Created by David SantoPietro.

In this video David explains each concept for centripetal motion and solves an example problem for each concept. Created by David SantoPietro.

In this video David explains the concepts in Work and Energy and does an example problem for each concept. Link for document: https://www.dropbox.com/s/t1w6xlnkozzel17/Energy%20review.pdf?dl=0. Created by David SantoPietro.

In this video David quickly explains each concept behind Forces and Newton's Laws and does a sample problem for each concept. Keep an eye on the scroll to the right to see how far along you've made it in the review. Created by David SantoPietro.

In this video David quickly reviews the momentum and impulse topics on the AP Physics 1 exam and solves an example problem for each concept. Created by David SantoPietro.

In this video, David quickly explains each torque and angular concept and does a sample question for each one. Created by David SantoPietro.

In this video David quickly explains each concept for waves and simple harmonic motion and does an example question for each one. Created by David SantoPietro.

Learn more about ATP: how it stores energy, and how that energy is released when it's converted to ADP and phosphate. Created by Sal Khan.

ATP synthase and its role in mitochondria during respiration and chloroplasts during photosynthesis.

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction. Created by Sal Khan.

What is the acceleration due to gravity at the space station. Created by Sal Khan.

A rational agent considers both accounting profit and economic profit. In this video, see an example highlighting the difference between accounting profit and economic profit from a business and a discussion of explicit and implicit costs of operating a business.

The simulation Sal mentions in the video can be found directly following this video in the lesson.

How and why a central bank would build foreign currency reserves. Created by Sal Khan.