DrOfEng

This AP Physics C (Mechanics) video covers worked examples on the big five kinematic equations (1D motion). This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. 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 provides an introduction to classes and objects in Java. Post your comments/questions below and please subscribe.

This AP Chemistry video covers a worked example on determining the percentage composition of each element in a pure substance. 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 different types of discontinuities in a funtion at a given x value: removable, removable (point), jump and essential (asymptote). 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 a worked example of a kinematics problem that tests your interpretation of motion graphs. This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. 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 covers worked examples on expressions, assignment and casting in Java. Post your comments/questions below and please subscribe.

This AP Chemistry video defines the empirical formula for pure substances. 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 for connecting multiple representations of limits. 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 a worked example on 1D motion. This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. 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 casting and ranges of variables in Java. Post your comments/questions below and please subscribe.

This AP Chemistry video explains the law of definite proportions for pure substances. 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 squeeze theorem for evaluating limits. 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 (Mechanics) video describes how to select the correct kinematics equations by considering multiple intervals of motion and objects in the given problem. This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. 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 compound assignment operators in Java, and the advantages of type safety. Post your comments/questions below and please subscribe.

This AP Chemistry video defines pure substances using several examples. 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 practice problems for selecting an appropriate procedure to evaluate limits. 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 describes how to approach kinematics problems involving non-uniform acceleration motion using differentiation and integration. This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. 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 basic arithmetic operations in Java, assignment statements and operator precedence. Post your comments/questions below and please subscribe.

This AP Chemistry video covers a worked example on mass spectrometry. 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 illustrates several algebraic techniques to rearrange expressions into their equivalent forms to simplify the evaluation of their limits: factorisation, conjugates, reciprocals and composite 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 derives the big five kinematic equations for the motion of a particle with a uniform acceleration. This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. 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 difference between primitive and reference types in Java, variables and constants, and provides an introduction to binary numbers and assignment operators. Post your comments/questions below and please subscribe.

This AP Chemistry video explains mass spectrometry and how it is used to identify the isotopes of an element, interpreting the mass spectrum, relationship between the molar mass and average atomic mass, and the mass defect. 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 illustrates how limits can be determined using their algebraic properties. Several theorems are introduced to simplify and evaluate limits of sums, differences, products, quotients and composite 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 instantaneous acceleration and average acceleration. This video is part of Unit 1 of AP Physics C (Mechanics) on Kinematics. You can contact me through the comments and community section, or email me at drofeng@gmail.com for questions.