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New videos from Khan Academy 2018-12-11T17:26:24.453770
Updated: 2 hours 14 min ago

What is the Internet?

Tue, 2018-12-11 17:26
What is the internet? Short answer: a distributed packet-switched network. This is the introduction video to the series, "How the Internet Works". Vint Cerf, one of the "fathers of the internet" explains the history of how the net and how no one person or organization is really in charge of it.

Kota reliquary figure

Sun, 2018-12-02 04:45
Kota reliquary figure (mbulu ngulu), late 19th to early 20th century, Gabon, wood, copper, brass, and bone, 59.69 cm high (Museum of Fine Arts, Boston) Speakers: Dr. Kathryn Gunsch, Teel Curator of African and Oceanic Art, Museum of Fine Arts, Boston and Dr. Steven Zucker

Benin Plaques

Sun, 2018-12-02 04:45
Benin Plaques, Edo peoples, Benin kingdom, Nigeria c. 1530-1570, Edo peoples, Benin kingdom, Nigeria (Museum of Fine Arts, Boston) Speakers: Dr. Kathryn Wysocki Gunsch, Teel Curator of African and Oceanic Art, Museum of Fine Arts, Boston and Dr. Beth Harris

D'mba mask (Baga peoples)

Sun, 2018-12-02 04:45
D'mba mask (Baga peoples, Guinea), 19th-20th century, wood, 118.1 x 35.3 x 67.5 cm (The Metropolitan Museum of Art) Speakers: Dr. Peri Klemm and Dr. Beth Harris

Solved example: Ohms law

Mon, 2018-11-26 11:04
Let's solve a couple of numerical on Ohm's law. 

Intro to current (& Amperes)

Mon, 2018-11-26 11:04
Let's explore what electric current is, how we calculate it, and it's unit (Amperes) and it's direction.

Intro to potential difference (& voltage)

Mon, 2018-11-26 11:04
Let's understand the concept of voltage intuitively. 

Solved example - Cost of operation of electrical device

Mon, 2018-11-26 11:04
Let's calculate the cost of operating an electrical device for a specific duration. 

Solved example: Potential difference & work done

Mon, 2018-11-26 11:04
Let's solve a couple of numerical on potential difference (voltage) and work done. 

Unit of charge (Coulombs)

Mon, 2018-11-26 11:04
Let's explore what the unit of electric charge (Coulombs is) 

Heating effect of current

Mon, 2018-11-26 11:04
We will explore what causes things to heat up when electricity runs through them. We will also learn how to calculate the amount of heat produced per second due to electricity.

Solved example: (Ohm's law graph)

Mon, 2018-11-26 11:04
Let's see how to compare the resistance of materials from V-I graphs.

Solved example: Finding current & voltage in a circuit

Mon, 2018-11-26 11:04
Let's learn how to calculate current and voltage across each resistor in a circuit.

Solved example: Power dissipated in bulbs

Mon, 2018-11-26 11:04
Let's tackle questions in which we have circuits with devices (like bulbs) whose power ratings are mentioned. 

Commercial unit of electrical energy

Mon, 2018-11-26 11:04
Let's explore the unit of electrical energy (kiloWatthour) that we use for commercial purpose.

Electric power & energy

Mon, 2018-11-26 11:04
Let's learn how to calculate electric power delivered & consumed in any circuit. 

Intro to charge

Mon, 2018-11-26 11:04
Let's explore what electric charges are. 

Ohm's law graph (verifying Ohm's law)(OLD)

Mon, 2018-11-26 11:04
Let's learn how to graphically verify Ohm's law in practice. We will also learn about Ohmic and nonOhmic devices. 

Prince Shōtoku at Age Two

Thu, 2018-11-22 04:20
Prince Shōtoku at Age Two, Kamakura period, c. 1292, Japanese cypress, assembled woodblock construction with polychromy and rock-crystal inlaid eyes (Harvard Art Museums/Arthur M. Sackler Museum Speakers: Rachel Saunders, Ph.D., Abby Aldrich Rockefeller Associate Curator of Asian Art, Harvard Art Museums Angela Chang, Conservator of Objects and Sculpture, Assistant Director, Straus Center for Conservation and Technical Studies, Harvard Art Museums Steven Zucker

Decoding art: Dürer's Melencolia I

Wed, 2018-11-21 19:22
This famous image is packed with meaning. Find out what each of these objects symbolizes, and how they relate to the overall theme of melancholy. Special thanks to the Minneapolis Institute of ArtAlbrecht Dürer, Melencolia I, 1514, engraving (Minneapolis Institute of Art)

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