How apoptosis is different from cell death by injury. Role in development and body maintenance.
There is *one* extremely rare case in which we use apostrophes to make things plural. David and Paige, KA's resident grammarians, discuss this unusual case.
We can solve circuits by the direct application of the fundamental laws: Ohm's Law and Kirchhoff's Laws. (Part 1 of 2). Created by Willy McAllister.
We solve the equations created by direct application of the fundamental laws: Ohm's Law and Kirchhoff's Laws. (Part 2 of 2).
Some applications of DNA technologies.
Sal applies Newton's first law the answer some true/false statements about why objects move (or not). Created by Sal Khan.
Using the Hardy-Weinberg equation to calculate allele and genotype frequencies. Created by Sal Khan.
From Lee's Surrender to Grant to Lincoln's Assassination. Created by Sal Khan.
David and Paige, KA’s resident grammarians, cover appositives and how to use commas along with them.
Apsidal Precession (Perihelion Precession). Created by Sal Khan.
Apulu (Apollo of Veii), from the roof of the Portonaccio temple, Italy, c. 510-500 B.C.E., painted terracotta, 5 feet, 11 inches high (Museo Nazionale di Villa Giulia, Rome). Speakers: Dr Steven Zucker and Dr. Beth Harris.
Ara Pacis Augustae (Altar of Augustan Peace), 13-9 B.C.E.Speakers: Dr. Beth Harris & Dr. Steven Zucker. Created by Beth Harris and Steven Zucker.
Ara Pacis Augustae (Altar of Augustan Peace), 13-9 B.C.E.Speakers: Dr. Beth Harris & Dr. Steven Zucker. Created by Beth Harris and Steven Zucker.
Arabia after World War I
Arbitrage is taking advantage in price differences to earn a profit. In this video we explore arbitrage opportunities in options markets. Created by Sal Khan.
Explanation of arbitraging a futures contract. Created by Sal Khan.
Arbitraging Futures Contracts II. Created by Sal Khan.
Introduction to Archimedes' principle and buoyant force. Created by Sal Khan.
Arch of Constantine, 312-315 C.E., approximately 20m high, 25m wide, and 7m deep, central opening approximately 12m high, Rome. Speakers: Dr. Steven Zucker and Dr. Beth Harris. Video produced by Dr. Naraelle Hohensee, Dr. Beth Harris, and Dr. Steven Zucker.
Triumphal Arch of Septimius Severus, 203 C.E., marble above a travertine base, roughly 23 x 25 m, Roman Forum speakers: Dr. Darius Arya, executive director of the American Institute for Roman Culture and Dr. Beth Harris This video was made in collaboration with the American Institute for Roman Culture.