DrOfEng

This AP Calculus AB/BC video gives the definition of the derivative (or instantaneous rate of change at a point) and multiple notations for representing the derivative. This video is part of Unit 2 of AP Calculus AB/BC on Differentiation - Definition and Fundamental Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Physics C (Mechanics) video explains how to draw the free body diagrams of the components of a massless cable and pulley systems and identify the forces. This video is part of Unit 2 of AP Physics C (Mechanics) on Newton's Laws of Motion. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Computer Science A video explains if-else statements in a Java program. Post your comments/questions below and please subscribe.

This AP Chemistry video covers a worked example on obtaining the parameters of the electromagnetic radiation source from a photoelectron spectroscopy experiment. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Calculus AB/BC video derives the derivative (or instantaneous rate of change at a point) from the average rate of a change. The average rate of change can be represented in multiple ways. This video is part of Unit 2 of AP Calculus AB/BC on Differentiation - Definition and Fundamental Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Physics C (Mechanics) video covers a worked example on the motion of a particle along an inclined plane with friction. This video is part of Unit 2 of AP Physics C (Mechanics) on Newton's Laws of Motion. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Computer Science A video explains if statements used to control the flow of a Java program. Post your comments/questions below and please subscribe.

This AP Chemistry video covers worked examples on interpreting a photoelectron spectrum to determine the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Calculus AB/BC video covers worked examples on using the Intermediate Value Theorem to determine if a continuous function has a solution in a closed interval. This video is part of Unit 1 of AP Calculus AB/BC on Limits and Continuity. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Physics C (Mechanics) video covers worked examples on the motion of a particle along a frictionless inclined plane. This video is part of Unit 2 of AP Physics C (Mechanics) on Newton's Laws of Motion. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Computer Science A video explains boolean expressions in Java. Post your comments/questions below and please subscribe.

This AP Chemistry video explains how to interpret a photoelectron spectrum to determine the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Calculus AB/BC video explains the Intermediate Value Theorem, which can be used to determine if a continuous function has a solution in a closed interval. This video is part of Unit 1 of AP Calculus AB/BC on Limits and Continuity. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Physics C (Mechanics) video defines the friction force along an inclined plane and how to determine the maximum angle before the block begins to slide. This video is part of Unit 2 of AP Physics C (Mechanics) on Newton's Laws of Motion. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Computer Science A video explains the Math class in Java. Post your comments/questions below and please subscribe.

This AP Chemistry video explains the steps of photoelectron spectroscopy, which is an experiment used to determine the electron configuration of an atom. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Calculus AB/BC video provides a practice problem on how to find horizontal asymptotes using limits at infinity. This video is part of Unit 1 of AP Calculus AB/BC on Limits and Continuity. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Physics C (Mechanics) video demonstrates how to analyse the motion of a body along a frictionless inclined plane. This video is part of Unit 2 of AP Physics C (Mechanics) on Newton's Laws of Motion. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Computer Science A video explains static methods in Java. Post your comments/questions below and please subscribe.

This AP Chemistry video explains the concepts of electron shielding and effective nuclear charge to determine the ionisation energy of atoms and ions relative to each other. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Calculus AB/BC video explains how horizontal asymptotes can be used to find the relative magnitudes of functions. This video is part of Unit 1 of AP Calculus AB/BC on Limits and Continuity. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Physics C (Mechanics) video defines static and kinetic friction. This video is part of Unit 2 of AP Physics C (Mechanics) on Newton's Laws of Motion. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Computer Science A video explains autoboxing and unboxing, which is the automatic conversion between primitive types and their corresponding object wrapper classes, and vice versa by the Java compiler. Post your comments/questions below and please subscribe.

This AP Chemistry video defines valence electrons, explains how to write the electron configuration of an atom using shorthand (or noble gas) notation, and how to qualitatively estimate the ionisation energy using the energy analog of Coulomb's law. This video is part of Unit 1 of AP Chemistry on Atomic Structure and Properties. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.

This AP Calculus AB/BC video explains how to find horizontal asymptotes using limits at infinity. This video is part of Unit 1 of AP Calculus AB/BC on Limits and Continuity. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.