Thursday, November 17, 2011

Thermal Conduction Problems (Level: APB)

This podcast introduces the formula for calculating rate of heat transfer through conduction, with an example problem to help demonstrate how the formula is used.


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Heat as Energy Transfer (Level: APB)

This podcast explains the definition of heat, and how it differs from internal energy. It also explains conduction, convection, and radiation as the three methods of heat transfer.


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Thermal Expansion (Level: APB)

This podcast discusses calculations for the linear and volume expansion of objects when heated.



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SHM & Uniform Circular Motion (Level: APC)

This podcast deals with the similarities between simple harmonic motion and uniform circular motion. Problem-solving is discussed, using functions for position, velocity, and acceleration of a simple harmonic oscillator.



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Energy in Simple Harmonic Motion (Levels: APB, APC)

This podcast explains how to think about the energy of a simple harmonic oscillator (specifically a mass-spring system), and also how to solve related problems.


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Wednesday, November 16, 2011

Review Blast: Forces during Rolling (Level: APC)

This podcast is a very quick review of what forces are acting on a rolling object, and how those forces affect the object's motion.


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Review Blast: Rotational Energy Conservation (Level: APC)

This podcast is a very quick review of how to use energy-conservation ideas when an object is rotating during its motion.



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Thursday, October 27, 2011

Center of Mass (APC)

This podcast introduces the concept of center of mass, both for a system of particles and for irregularly-shaped objects.


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Wednesday, October 19, 2011

Review Blast: Energy Conservation (Levels: Intro, APB, APC)

This podcast is a very quick review of how to use energy-conservation ideas to solve motion problems where no friction is involved, and also what extra thinking to use when friction is involved.



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Work, Energy, & Momentum Conceptual Questions (Intro, APB, APC)

This podcast is intended to review some conceptual ideas related to work, energy, and momentum. It just consists of 8 conceptual questions, with answers discussed.


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Tuesday, October 11, 2011

Potential Energy Curves (APC)

This podcast introduces Potential Energy Curves, after students are already familiar with energy concepts such as kinetic and potential energies, and also E-conservation.


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Monday, August 29, 2011

Review Blast: Projectiles (Levels: Intro, APB, APC)

This podcast is a very quick review of projectile ideas, including the differences between x- and y- components of motion, how to solve problems when projectiles are launched horizontally, and what additional thinking is involved if a projectile is launched at an initial angle.



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Sunday, August 28, 2011

Intro to Vector Addition (Levels: Intro, APB, APC)

This podcast introduces you to how to add vectors graphically, and also how to use basic trig to solve for resultants and vector components. (Only deals with parallel and perpendicular pairs of vectors.)


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Tuesday, August 16, 2011

Displacement, Velocity, & Acceleration Concepts (Levels: Intro, APB, APC)

This podcast introduces concepts of displacement, velocity, and acceleration. Basic calculations are discussed, as well as the meanings of positive and negative values for those three quantities in straight-line motion situations.


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Velocity-Time Graphs (Levels: Intro, APB, APC)

This podcast discusses how to represent different motions on velocity-time graphs, including the meaning of slope and area these graphs.


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Position-Time Graphs (Levels: Intro, APB, APC)

This podcast discusses how different motions are represented on graphs of position versus time, with a special emphasis on the meaning of slope for these graphs.


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Monday, May 16, 2011

Definite Integrals (Level: APC)

This podcast explains how to evaluate definite integrals at given limits of integration, and how this idea relates to finding the area under the curve when a function is graphed.


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Indefinite Integrals (Level: APC)

This podcast introduces integrals with the idea "un-doing" a derivative, and then works several examples based on the reverse of the power rule.


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Derivatives and Max/Min (Level: APC)

This podcast explains how to apply your understanding of derivatives to the problem of finding the maximum or minimum value of a function.


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Chain Rule and Power Rule (Level: APC)

This podcast introduces how to perform derivatives for some more complicated functions, specifically how to use the chain rule for derivatives of composite functions, and how to use the product rule for the derivative of the product of two functions.


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Other Common Derivatives (Level: APC)

This podcast introduces common derivatives that can't be performed with the power rule, such as derivatives of some trigonometric, exponential, and logarithmic functions.


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Derivatives and Power Rule (Level: APC)

This podcast introduces the concept of derivatives, at a depth appropriate for students beginning a calculus-based physics course. This includes a brief description of what a derivative means, and how to find derivatives using the power rule.


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Friday, May 6, 2011

Review Blast: PV Diagrams (Level: APB)

This podcast is a very quick review of how to use PV (pressure-volume) diagrams to find temperature at a state, work done during a process or cycle, and change in internal energy during a process or cycle.


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Review Blast: 1st Law of Thermodynamics (Level: APB)

This podcast is a very quick review of heat and work as ways to transfer energy into or out of a system, along with rules for when heat and work should be treated as positives or negatives when problem-solving.


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Tuesday, May 3, 2011

Review Blast: Connected Objects (Levels: Intro, APB, APC)

This podcast is a very quick review of strategies to use when solving force problems involving multiple objects connected by rope or string.


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Monday, May 2, 2011

Review Blast: 2nd Law Problems (Levels: Intro, APB, APC)

This podcast is a very quick review of how to use 2nd Law and Equilibrium ideas, along with force-component and friction ideas, when solving force problems.


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Thursday, April 21, 2011

Review Blast: Parallel-Plate Capacitors (Levels: APB, APC)

The podcast is a very quick review of the meaning of capacitance, the factors that affect the capacitance of a parallel-plate capacitor, and rules for capacitors in series and parallel.


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Review Blast: Curved Mirrors (Levels: Intro, APB)

This podcast is a very quick review of curved mirrors, including how to draw ray diagrams, what types of images are formed by different curved mirror situations, and how to perform calculations related to curved mirror image formation.


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Wednesday, April 20, 2011

Review Blast: Electric Potential (Levels: APB, APC)

This podcast is a quick review of what electric potential means, and also how potential is related to electric field strength. A very brief discussion is also included that reviews how to calculate potential due to a collection of point charges.


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Tuesday, April 19, 2011

Review Blast: Induced emf (Levels: Intro, APB, APC)

This podcast is a very quick review of Faraday's law of induction, discussing the meaning and calculation of magnetic flux, and the various ways in which a change in flux can happen to lead to induced emf. An added 2 minutes at the end of this podcast reviews how calculations are different in a calculus-based application of Faraday's law.


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Review Blast: Magnetic Field & Forces (Levels: Intro, APB, APC)

This podcast is a very quick review of how to perform several different calculations related to magnetic field. (It does NOT review directional aspects of magnetic forces, such as the right-hand rule.) Long straight current-carrying wires are discussed, from the perspective of B-fields they create and how they are affected by external B-fields. The effects of a B-field on a moving charge's motion are also reviewed.


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Review Blast: Series & Parallel Circuits (Levels: Intro, APB, APC)

This podcast is a very quick review of the differences between series and parallel circuits in terms of the way current flows, and in terms of the equivalent resistance of the circuit.


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Monday, April 18, 2011

Review Blast: Basic Electricity Ideas (Levels: Intro, APB, APC)

This podcast is a very quick review of the meanings of and relationships between basic electrical quantities (current, voltage, resistance, and power), and also a very quick review of the factors about a wire that affect its resistance.
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Friday, April 15, 2011

Review Blast: Electric Field (Levels: Intro, APB, APC)

This podcast is a very quick review of the effects of electric field, and also of how to calculate electric field due to multiple point charges.
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Wednesday, April 13, 2011

Review Blast: Electric Forces (Levels: Intro, APB, APC)

This podcast is a very quick review of Coulomb's Law and how to use it to solve problems involving multiple electric force vectors.
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Friday, April 1, 2011

Ampere's Law (APC)

This podcast introduces Ampere's Law, a powerful formula allowing the calculation of magnetic fields due to currents for certain symmetric situations. Comparisons are made to Gauss' Law in an attempt to remind students of the power of symmetry when calculating fields, and example problems are also included.
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Thursday, March 3, 2011

Intro to RC Circuits (APC)

This podcast introduces concepts related to RC circuits - circuits with a resistor and capacitor in series with a voltage source. Intended to intro the ideas to students who have already learned capacitor ideas and are in the midst of studying electric circuits.

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Wednesday, February 23, 2011

Magnetic Directions Review (APB, APC)

This podcast reviews rules for determining directions in magnetic field problems. Topics include the right-hand rule for forces on currents and charges, right-hand rule for B-field created by a current, and Lenz's law.

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Wednesday, January 5, 2011

Electric Force Problems (Levels: Intro, APB, APC)

This podcast is a review of how to use vector addition ideas, along with Coulomb's law, to find the net force acting on a charge when it is pushed/pulled by multiple electric forces.

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