Physics

### The Physics Philes, lesson 109: Speed of Sound Part 2

Last week we started discussing the speed of sound and how that speed changes depending on the medium. This week we’ll finish up that topic with a discussion of how fast sound moves in a solid and a gas. First, let’s tackle the speed of sound through a solid rod …

### The Physics Philes, lesson 108: The Speed of Sound

Last week we talked a bit about how our ears work and how they perceive sound. If we’re having a conversation, the sound seems to travel from my mouth to your ears in an instant. But what do you hear in a thunder storm? We know that thunder is the …

Physics

### The Physics Philes, lesson 106: The Sound of Physics

We’ve just spent basically forever getting our hands dirty with mechanical waves. Now it’s time to get our hands even dirtier with a specific type of mechanical wave: the sound wave. Sound waves are something most of us are familiar with. The general definition of sound is actually quite simple. …

Physics

### The Physics Philes, lesson 105: Physics Makes Beautiful Music

Over these past several weeks, we’ve learned a lot about mechanical waves. However, what we’ve learned is a simple version of the waves we come in contact with every day. For example, the sound string instruments make are complex standing waves. To illustrate this, let’s think about what would happen …

### The Physics Philes, lesson 104: Standing O for Standing Waves

Now that we have nodes, antinodes, and standing waves under our belt, it’s time to move on to something called normal modes. But wait. Let’s step back a bit. As we were learning about standing waves, we didn’t care so much about the length of the string or what was happening …

### The Physics Philes, lesson 103: Of Nodes and Anitnodes

Last week we looked at what happens when a wave pulse is reflected off a barrier. But what happens when a sinusoidal wave on a string is reflected? That’s our topic today as we discuss standing waves on a string. In order to do this, we need to use a …

### The Physics Philes, lesson 102: Reflections

We’ve been talking about waves for a while now. But we’ve been assuming that waves will just travel in one direction forever. That’s not very realistic, is it? In real life, waves are bouncing all over the place. They are hitting the boundaries of their mediums, reflecting back, and interfering …

### The Physics Philes, lesson 100: Need for Wave Speed II

Oh my goodness. Has it been a week already? Let’s see, where were we? Oh that’s right. Last week we started talking about how to find the speed of a transverse wave on a string. The first method was fairly straight forward. Now it’s time to move on to the …