Use to introduce the characteristics of waves. This video has no subtitles. Source: Please help to correct the texts: Considering that the recipient immune system during its maturation has become able to recognize and. Here we have an ordinary piece of rope. This is a typical wave, and waves form whenever there's a disturbance of some kind. These notes help students as they just fill in the blanks as the video plays. More specifically, its intensity is equal to its power divided by the area it's spread over and power is energy over time, so changing the amplitude of a wave can change its energy and therefore its intensity by the square of the change in amplitude, and this relationship is extremely important for things like figuring out how much damage can be caused by the shockwaves from an earthquake. Review questions at the end of the notes require students to think about the material they took notes on during the video. In other words, if you double the wave's amplitude, you get four times the energy, triple the amplitude and you get nine times the energy. Two meters away from the source, and the intensity of the wave will be four times less than if you were one meter away. Today, you learned about traveling waves and how their frequency wavelength and speed are all connected. Traveling waves crash course physics #17 answer key pdf. Suppose you attach one end of the rope to a ring that's free to move up and down on a rod. Multiply the wavelength by the frequency and you get the wave's speed, how fast it's going, and the wave's speed only depends on the medium it's traveling through. We also talked about different types of waves, including pulse, continuous, transverse, and longitudinal waves and how they all transport energy.
Previous:||Shakespeare's Sonnets: Crash Course Literature 304|. I love using the Crash Course videos in my classroom! Now, if you send a pulse along the rope, it will still be reflected, but this time as a trough. They also have a wavelength, which is the distance between crests, a full cycle of the wave, and a frequency, which is how many of those cycles pass through a given point every second. The same thing was mostly true for the waves you made on the trampoline. Now, sometimes multiple waves can combine. So why is the relationship between amplitude and energy transport so important? Traveling waves crash course physics #17 answer key objections. But the waves we've mainly been talking about so far are transverse waves, ones in which the oscillation is perpendicular to the direction that the wave is traveling in. It's not one of those magician's ropes that can mysteriously be put back together once its been cut in half, and it's not particularly strong or durable, but you might say that it does have special powers, because it's gonna demonstrate for us the physics of traveling waves.
Bilingual subtitles. Traveling waves crash course physics #17 answer key quiz. These notes help students as they jusPrice $8. The surface area of a sphere is equal to four times pi times its radius squared. The waves were traveling along the surface horizontally, but the peaks were vertical. And while that information is traveling outward, the spot where your feet first hit the trampoline is already recovering, moving upward again, because of the tension force in the trampoline, and that moves the area next to it upward, too.
Classroom Considerations. Com/9vy1r6 ------ Sehr geehrte Frau Jasmin Moeller, Glücklicherweise. Expects a basic understanding of the characteristics of a wave. Then, there's the continuous wave, which is what happens when you keep moving the rope back and forth. It can also be used as a longer homework assignment or for students who need to make up a class lesson on the same subject. Anything that causes an oscillation or vibration can create a continuous wave. It looks like the wave's just disappeared. Instructional Ideas. This video is hosted on YouTube. These are the kinds of waves that you get by compressing and stretching a spring, and they're also the kinds by which sound travels, which we'll talk about more next time, but all waves, no matter what kind they are, have something in common: they transport energy as they travel. Ropes and strings are really good for this kind of thing, because when you move them back and forth, the movement of your hand travels through the rope as a wave. Waves are made up of peaks with crests, the bumps on the top, and troughs, the bumps on the bottom. Often, when something about the physical world changes, the information about that disturbance gradually moves outwards, away from the source in every direction, and as the information travels, it makes a wave shape. That's because when the pulse reached the fixed end of the rope, it was trying to slide the end of the rope upward, but it couldn't, because the end of the rope was fixed, so instead, the rope got yanked downwards, and the momentum from that downward movement carried the rope below the fixed end, inverting the wave.
Constructive and destructive interference happen with all kinds of waves, pulse or continuous, transverse or longitudinal, and sometimes, we can use the effects to our advantage. The more we learn about waves, the more we learn about a lot of things in physics. Uploaded:||2016-07-28|. It doesn't matter how loud or quiet it is, it just depends on whether the sound is traveling through, say, air or water. One lonely crest travels through the rope. In the case of a longitudinal wave, the back and forth motion is more of a compression and expansion. Presenter's passion for the material shows in her presentation. Last sync:||2023-02-13 18:30|. That's why being just a little bit further away from the source of an earthquake can sometimes make a huge difference.
That's why the speed of sound, which is a wave, doesn't depend on the sound itself. With these notes a sub doesn't need to have a background in physics to teach the class. But there's also longitudinal waves, where the oscillations happen in the same direction as the wave is moving. The narrator includes a discussion of reflection and interference. So as a spherical wave moves further from its source, its intensity will decrease by the square of the distance from it.
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