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...

Students will learn about the different frequencies along the electromagnetic spectrum. Vivid animation is used to explore the visible spectrum of light and the colors it allows us to see everyday. The video also investigates various...

In this video Paul Andersen explains how the period is the time between wave and the frequency is the number of waves per second. Period is measured in seconds and frequency is measured in Hertz. Wave period and wave frequency are...

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...

Waves transfer energy from one place to another. You should already know how to describe them in terms of frequency, wavelength and amplitude In this video we’re going to look at the two ways they can be classified. Waves are produced as...

The heights of a dual gravity drained tank are solved with the Scipy.integrate function ODEINT. This example demonstrates how to solve the differential equation and plot the solution.

Another little dancie dance for you to learn babeh! Today we work on a contemporary dance suitable for all levels of dancers, with some ooey gooey movement and allll the feelings. Hope you enjoy! Don't forget to post a clip of you doing...

En este video aprenderás qué es el código postal o zip code y para qué sirve el código postal.

This is a lecture video on the topic of wavelength and color. The video focuses on the visible light portion of the electromagnetic spectrum, which can be split into different colors. The video explains the relationship between...

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...

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...

A quick demonstration of gravity and motion in this experiment with raw eggs before we cook them for breakfast. All we needed was: a toilet paper tube, a paper plate, a glass of water and a bit of curiosity.

Scientists use satellite data to peer into the massive storm – learning how and why it changed throughout its course.



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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...

The equation for the harmonic frequencies of stringed instruments is derived. Harmonic numbers and fundamental frequency are defined. A guitar is used to demonstrate harmonic numbers.

The equations for the harmonic frequencies of open and closed pipe wind instruments are derived. An animation of a longitudinal standing wave pattern in a closed pipe is shown. Displacement and pressure nodes and antinodes are shown.

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.

Learn some German vocabulary while Herr Antrim recalls his favorite April Fools' Day jokes of all time. <b<b<b<b<b<b<b<b<b<b<b<b<br/>r/>r/>r/>r/>r/>r/>r/>r/>r/>r/>r/>r/>

👉 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....

In this video Paul Andersen explains how the wavelength of a standing wave is determined by the boundary length and frequency of the wave. The fundamental frequency has a wavelength double the boundary length. Harmonics are built on...

According to legend, the renowned scholar Jalaluddin Muhammad Rumi was giving a lecture when a disheveled man approached and asked him the meaning of his academic books. Rumi didn’t know it yet, but this question and this man would...

Hank's news this week informs us on a couple of crazy science experiments, updates us on some earlier topics (dangerous asteroids and ancient phallic rock art), and briefs us on a new study that seeks to find the evolutionary origins of...

In this video Paul Andersen details the waves in electromagnetic radiation. There is an inverse relation between the wavelength and frequency of electromagnetic waves. Electromagnetic radiation includes gamma rays, x-rays, infrared...