Videos tagged physics
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PY106 pre-class video for session 11 - Series-parallel combination circuits
A worksheet to accompany this video is available at http://physics.bu.edu/~duffy/EssentialPhysics/combination.pdf
This video is a tutorial in one basic method of analyzing a series-parallel combination circuit (a circuit with one battery, connected [...]to a set of resistors which have both series and parallel combinations). We'll do one example of the method, which involves contracting the circuit down to a single equivalent resistor, and then expanding it back out to the original circuit. At each step of the expansion, we can determine the current through, and the potential difference across, each of the resistors.
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PY106 pre-class video for session 1 - Electric charge
Carrying on from PY105, we start PY106 by discussing some of the basic ideas about electric charge. We'll take a look at some simple experiments that we can do with charged objects, and explain them in terms of our basic model of charge. We'll also [...]talk generally about the ideas that charge is quantized, and that charge is conserved.
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PY105 pre-class video for session 38 - The ideal gas law and kinetic theory
In this video, we will talk briefly about an ideal gas, and state the ideal gas law. We will also go over the results of kinetic theory - kinetic theory is the application of basic principles of physics to individual molecules. The main result of [...]kinetic theory is a fundamental insight into what temperature is, which is a measure of the average kinetic energy of the molecules.
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PY105 pre-class video for session 35 - Fluids 2, density and pressure
This video is the second of three videos on fluids. In this one, we cover various topics. We start by stating Archimedes' principle, which leads to a discussion of density. From there, we go on to talk about pressure. We'll see how pressure changes [...]with depth in a static fluid, and then we'll bring things full circle, looking at the connection between fluid pressure and the buoyant force.
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PY105 pre-class video for session 6 - free-body diagrams
This video covers free-body diagrams. A free-body diagram is a diagram showing all the forces applied to an object, or a system of objects, in a particular situation. We go over how to draw free-body diagrams, and then how to use a free-body diagram [...]to help apply Newton's second law.
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PY105 pre-class video for session 4 - acceleration
This video focuses on the idea of acceleration. It includes equations that are applied to situations in which the acceleration is constant, and looks at free fall, which is a common example of one-dimensional motion with constant acceleration. Also [...]covered is the use of graphs in a constant-acceleration situation.
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PY105 pre-class video for session 2 - vectors + 1-D motion
This video covers the concepts of vector components and vector addition, as well as the concepts of displacement and distance.
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Heat Engines
In this video, we discuss the Carnot cycle for a heat engine. An engine using the Carnot cycle is reversible, so the Carnot cycle results in the highest possible efficiency for an engine operating between a particular pair of high and low [...]temperatures.
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Forces - an introduction
In this video, we define force, and then go on to discuss three forces in particular, the force of gravity, the force of tension, and the normal force.
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