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This is a video of DALF C2 speaking test in exam condition with a candidate and two examiners. This video presents the three parts of DALF C2 oral production: followed monologue: presentation of the document (1st part), followed...

In this video Paul Andersen explains how the wavelength is the distance between oscillations in a wave. In a longitudinal wave this might be the distance between areas of compression. In a transverse wave it might be the distance between...

What are isonitriles good for? The Passerini reaction! This is a very neat multi-component reaction that is good for generating chemical libraries. When was it invented? What's the mechanism? What are we doing with it today? Let's find out!

The video explains the concept of redshift and blueshift in the context of galaxy movement and how it relates to the shift in wavelength of light emitted by a galaxy. The video then shows how to use an equation to calculate the shift in...

This video discusses the properties that all waves have in common, including amplitude and wavelength. It also demonstrates how to calculate the speed of a wave using the equation v = Fλ, where v is the wave speed, F is the frequency in...

👉 Learn how to identify angles from a figure. This video explains how to solve problems using angle relationships between parallel lines and transversal. We'll determine the solution given, corresponding, alternate interior and exterior....

Award Winning Short Film. Learn how the body and brain function, observe how we can dispel the stigma of mental health and see how your mental health impacts a community. This highly sensitive suicide prevention film contrasts how...

As a food writer, and blogger, Kathleen Bauer prefers to write from first-hand experience. The idea for pasture to plate came after responding to an offer from a farmer to purchase half a pastured pig.

In this video Paul Andersen explains how matter can act as a wave at the nanoscale. Louis de Broglie showed that the wavelength of matter can be calculated using the momentum of an object and Planck's constant. The Davisson-Germer...

The wave model of the electron can be used to explain the Bohr model. Electrons are found in certain orbits because they interfere with themselves and create standing waves. When the wavelengths don't match up with a whole integer they...

In this video Paul Andersen explains how the wave speed measure the speed of a wave through a medium. The medium determines the speed of the wave. The velocity of the wave is equal to the product of the wavelength and the frequency of...

This video explains how to conduct an experiment to determine the speed of a wave on a string. It shows the steps involved, such as setting up the string or wire, creating a wave on it, and adjusting the distance between the two ends to...

This is a solution video on destructing tuples with Rust.
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This clip is from the chapter "Beginner to Intermediate Lessons" of the series "Rust Programming 2023 - A Comprehensive Course for Beginners".This section focuses on...

In this video, the topic of food security and its various factors affecting food supplies are discussed. The narrator explains that having enough food to feed a population, especially when population numbers are rising, is important for...

This video discusses the importance of absorption spectroscopy. A brief idea about ultraviolet and visible spectroscopy is presented in the video. The video shows the light sources used for different regions of operations. The type of...

The pandemic has been a massive catalyst for change for brands. Ukonwa Ojo, Amazon Studios' CMO, looks at the tone brands should strike and how Amazon intends to navigate the streaming wars as lockdowns ease.

The video explains two important features of a wave: the frequency and the time period. It uses a visual representation of a transverse wave and a longitudinal wave to show the peaks, troughs, amplitude, and wavelength of a wave. The...

Wave Motion | Waves | Physics | FuseSchool All waves can transfer energy from one place to another without transferring any matter. This is done by a series of disturbances or vibrations that carry the energy. Just like the people in...

Paul Andersen explains how natural selection is a major mechanism in evolution. The video begins with a discussion of Charles Darwin and the details of natural selection. The data of the peppered moth during the industrial revolution...

Howcast - Learn how to prevent and fix inside out circular knitting from expert Jessica Kaufman in this Howcast video.

When Ernest Rutherford realized that atoms have a heavy nucleus, he hypothesized that the way the moon orbits earth is the same as the way an electron orbits the nucleus of atoms. We now know an atom would...

Howcast - Learn about the top seven museums to visit on a trip to Tokyo in this Howcast travel video.

When the nucleus was discovered by Rutherford, it became clear the classical world was not reality, because according to classical electromagnetism, the electron should collapse to the proton. This problem was...