Ben HolmquistMar 192 min3 Underused Features for Zoom TutoringThese last two weeks, we’ve had the chance to speak with many learning centers about their plans to move tutoring online. For those of you utilizing Zoom, he...

Ben HolmquistJan 222 minMarketing for Campus Learning CentersIf you manage a campus tutoring or learning center, these four tactics can help raise awareness among students.

Ben HolmquistJan 172 minBeing Light on Your FeetA lot of change has come my way these last few weeks, and the importance of understanding, accepting, and responding to change quickly is more clear than eve...

PenjiJan 125 minPhasors and the Unit CirclePretty much every science teacher/professor I’ve ever had told me the same thing about science education: “Everything I tell my students is partially a lie. ...

PenjiJan 121 minGenerate Parentheses ProblemThe problem is: Given N pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given N = 3, a solution ...

PenjiJan 112 minPHYS 1120 / 2020 Midterm 2 Study GuideVoltage Voltage from a point particle: Voltage from an electric field: * The only distance Δd that matters is the distance that is parallel to the electric f...

PenjiJan 115 min10 Keys to College SuccessPenji has students from every major serving as tutors. What follows is a constantly evolving document: the ten most popular tips given by our tutors, in thei...

PenjiJan 113 minThevenin and Norton Circuts for Independent SourcesThevenin and Norton Equivalent circuits are most often used to simplify a circuit. They are useful when you are interested about the behavior of an element ...

PenjiJan 113 minConvolution IntervalCalculate the output of this system given that the input signal and the system’s impulse response are: One thing that should be addressed before we start the...

PenjiJan 112 minDetermining SN1 Versus SN2 ReactionsSubstitution reactions may seem like a difficult concept to understand. However, as long as you follow these guidelines, you will be successful. When you fir...

PenjiJan 115 minGibbs Free Energy and Spontaneous ReactionsIt’s Quiz Time! Close your notes, clear your desks, and answer the following question: What does the following graph depict? A friend of mine said: “it’s an...

PenjiJan 113 minMatrix Multiplication ReviewOverview Matrices are a way of grouping numbers, and are organized into rows and columns. Matrices are often used as a way of representing several equations ...

PenjiJan 112 minSolving RC Circuit with the Heavyside Operator MethodAssume Vs(t) is equal to 3u(t). Find v(t) as a function of time and find the capacitances of the two capacitors. Assume all initial conditions are 0. Befor...

PenjiJan 111 minPHYS 1110/2010 Midterm 2 Study GuideQuick recap of Force Problems Write down knowns + unknowns Draw a picture Choose a coordinate system + Usually x is horizontal, y is vertical + For ramps cho...

PenjiJan 113 minElectrostatics: Gauss's Law & Superposition PrincipleGauss’s Law is a useful tool for solving electrostatics problems. Instead of computing hard nasty integrals, we can use Gauss’s Law to simplify the computati...

PenjiJan 113 minAcids and Bases: Buffers and Titration CurvesA buffer, by definition, is a solution that resists change in pH. In a buffered solution, adding acid will only result in a small decrease in pH whereas addi...

PenjiJan 114 minPhase Diagrams and Lever RuleAt first glance, there seems to be a lot going on in a two-phase diagram. There are temperatures, percentages, different elements, and symbols you’re not use...

PenjiJan 113 minDC Steady State AnalysisFirst thing to address is what is D.C. Steady State. Basically, all that means is that the circuit has been active/running for a long time. For power dissi...

PenjiJan 112 minEmpirical vs. Molecular FormulasOverview When going through introductory chemistry courses, a common problem that you will run into is your professor asking for either empirical or molecula...

PenjiDec 10, 20191 minImaginary Numbers and Euler’s Formulas ReviewA lot of people seem to freak out when they see an i in math or j in electrical engineering. So hopefully this will help. The first thing we want to go over...