 Waves come in many forms, traveling waves, standing waves, transverse waves, longitudinal waves. But why study these? Because they let us do cool stuff like create musical instruments, radar guns to give you spinning tickets, and even to detect the expanding universe. Welcome to Oscillations and Waves. Let's dive right in. Inside the cores, you'll find two units. The first is covering the fundamentals of oscillations. We're gonna put a mass, attach it to a spring and see what happens to it. We'll learn about the simple harmonic motion, the map behind it, the energy, the time period, all the fundamentals that we need. Then in the next unit, we're gonna expand on it. We're gonna learn about waves, the properties, again, the math, and then we'll put all of our knowledge together to understand some cool stuff like how you make music, how do noise-canceling headphones work, and eventually, we'll also learn about how do we know that our universe is expanding. And if you go inside each unit, there are videos that will teach you concepts, then there are practice questions to help you feel all the gaps. There will also come quizzes and unit tests which will help you completely master these topics. So, if you're excited to dive into this beautiful world of oscillations and waves, I'll see you inside.