Videos tagged py105
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PY105 pre-class video for session 40 - Heat capacity, and a sample thermodynamics problem
In our final video of the semester, we talk about heat capacity for an ideal gas, and then we go through an example problem. The example thermodynamics problem involves the ideal gas law, the first law of thermodynamics, and calculations of work and [...]the change in internal energy.
Look for PY106 videos in 2011, covering electricity and magnetism, waves and optics, and some modern physics.
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PY105 pre-class video for session 39 - The first law of thermodynamics
In this video, we take a look at the P-V diagram (the graph of pressure vs. volume), to see how it can provide temperature information. Then, we go over the first law of thermodynamics, which is essentially energy conservation applied to a [...]thermodynamic system. We wrap up the video by seeing how the P-V diagram can be used to find the work done by a system of ideal gas, and we go through a numerical example to find the work done in a particular case.
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PY105 pre-class video for session 37 - Temperature
This will be our first video (of four) related to thermal physics. In this video, we will define temperature, and then look at three common temperature scales, and talk about how to convert between them. We will also take a quick look at thermal [...]expansion, the idea that an object will change size as its temperature changes.
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PY105 pre-class video for session 36 - Fluids 3, fluid dynamics
This is the third and final video about fluids, focusing on flowing fluids (fluid dynamics). We'll use a very simple model of flowing fluids, to which we can apply two basic equations. One is the continuity equation, which basically says that the [...]narrower you make a pipe, the faster the flow will be. The second equation is Bernoulli's equation, which comes from applying energy conservation to fluids.
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PY105 pre-class video for session 34 - Fluids and Newton's second law
In this video, we start talking about fluids. The buoyant force, exerted by a fluid on an object, is compared to the normal force. The key idea in this video is that Newton's second law can be applied to determine the buoyant force.
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PY105 pre-class video for session 33 - Simple harmonic motion 2
This is the second video, of two, related to simple harmonic motion. In this video, we go over the basic equations we use that give an object's position, velocity, and acceleration, all as a function of time, when it is experiencing simple harmonic [...]motion. We also derive the expression for the angular frequency for a block that is experiencing simple harmonic motion because it is attached to an ideal spring, by analyzing the forces on it. Finally, we take a quick look at a simple pendulum, and derive the expression for its angular frequency.
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PY105 pre-class video for session 32 - Simple harmonic motion 1
In this video, we will introduce the concept of simple harmonic motion, using a block on a spring as our example system. To analyze this system, we will apply some familiar ideas. We'll start by looking at the force exerted on a block by a spring, [...]and then we'll go from there to think about the work done by the spring, and go on from there to define an equation for potential energy for springs. So, the system is a new one, but the concepts we'll be bringing in to analyze it are ones we have experience with.
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PY105 pre-class video for session 31 - Gravitation
In this video, we'll talk about more general equations for gravitational force and gravitational potential energy than the equations we've been using so far. Instead of good old mg, we'll use Newton's universal law of gravitation to look at the [...]gravitational force between two objects. Similarly, instead of mgh, we'll discuss a more general equation for gravitational potential energy, and then we'll apply that equation to look at the speed a projectile would have to have at the Earth's surface so it never came back down again. That speed is known as the escape speed.
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PY105 pre-class video for session 30 - Rotational kinetic energy
In this video, we introduce the concept of rotational kinetic energy, and then we apply it to a spinning figure skater. Because this is the last video on rotational motion, the video also includes a summary of the parallels between straight-line [...]motion and rotational motion.
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