Weatherthings
Weather Things: Storms
The atmosphere is dynamic and forever changing to maintain balance. The ingredients of air, sunlight and water allow life to exist on Earth, but they also generate calm scenes like rainbows, as a tornado ends. All storms move moisture,...
Professor Dave Explains
IIT/JEE Chemistry Practice #35: Gaseous Equilibria
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
IIT/JEE Chemistry Practice #34: Equilibrium Constants
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Virtually Passed
Pulleys and Tension in static equilibrium Summary
If a pulley is in static equilibrium and the following is true: 1) Rope is massless 2) Pin is frictionless Then the tension in the cable will be constant everywhere along the cable. There is only 1 force (tension) that is internal in the...
Professor Dave Explains
IIT/JEE Chemistry Practice #36: Precipitation Reactions
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Professor Dave Explains
Practice Problem: Analyzing Acid-Base Equilibria
Acids! Bases! Conjugate acids! Conjugate bases! We definitely have to be able to label such things, and we should also know how to state which direction in an acid-base equilibrium is preferred. To do this we should know how to tell...
Professor Dave Explains
The Common Ion Effect
We've learned a few applications of the solubility product, so let's learn one more! This is called the common ion effect, and it can be a good way to influence the solubility of a particular ionic compound in solution, or even promote...
Professor Dave Explains
Practice Problem: Cell Potential, Equilibrium Constants, and Free Energy Change
Mercy me, how are cell potential, equilibrium constants, and free energy change all related? By a few different equations, that's how. See if you can solve for these values given some data!
Professor Dave Explains
Practice Problem: Free Energy and Nonstandard Conditions
We know that a lot of thermodynamic data is collected under standard conditions, but sometimes we will want to assess the free energy change associated with a process that is not occurring under standard conditions. Any other conditions...
Catalyst University
Kinetics: The Pre-Equilibrium Approximation
Kinetics: The Pre-Equilibrium Approximation
Professor Dave Explains
Practice Problem: ICE Box Calculations
Sometimes when we do equilibrium calculations, we have to use an ICE box. Don't worry it won't be chilly, it stands for initial, change, and equilibrium. Let's use this technique to calculate some equilibrium concentrations!
Professor Dave Explains
Practice Problem: Solubility Product Constant Calculations
We've learned that there are ionic solids that are insoluble in water, and while for the most part that's accurate, we are bending the truth a little bit. Even compounds that are totally water insoluble will still dissolve a teeny tiny...
Professor Dave Explains
Practice Problem: Calculating Equilibrium Concentrations
We know how to write equilibrium constant expressions for any equilibrium, and we know that they relate the equilibrium constant to the equilibrium concentrations for all of the substances in the system. Let's see if we can calculate a...
Professor Dave Explains
IIT/JEE Chemistry Practice #23: Graham's Law of Effusion
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
Flipping Physics
Conductors in Electrostatic Equilibrium - Review for AP Physics C: Electricity and Magnetism
AP Physics C: Electricity and Magnetism review of Conductors in Electrostatic Equilibrium including: defining conductors which are in electrostatic equilibrium, deriving the electric field inside the conductors, electrostatic shielding,...
Professor Dave Explains
Organic Chemistry Synthesis Challenge 5
Need some organic chemistry practice? Here's a tricky synthesis to try!
ACDC Leadership
Supply and Demand Tips- Macro and Micro
What's up. First, thanks for watching my videos. Your rock! Second, I made this video to help you see the big picture. I cover topics like the law of demand, the law of supply, equilibrium, disequilibrium, single-shifts, and...
Curated Video
013 A Review of the Action Potential
Depolarization, repolarization, hyperpolarization - It's all here. Watch this for a review of the action potential.
Curated Video
006 Donnan Equilibrium and Driving Force
In this Video, I talk about Donnan Equilibrium and how it results in the Driving force.
Curated Video
009 Depolarization: Phase 1 of the Action Potential
In this video, I talk about the first phase of the action potential - Depolarization. In order for the action potential to take place, the stimulus needs to be strong enough to bring the membrane potential at the axon Hillock to...
Virtually Passed
Method of sections example 1
Method of sections is a technique used to find the internal forces in a truss. Draw a FBD of a section of the truss and make cut sections though the members that you wish to analyze. Apply equilibrium equations (sum of forces and sum of...
Curated Video
Consumer and Producer Surplus in Economics
The video provides an overview of consumer and producer surplus and how they are represented on demand-supply diagrams. It explains how the demand curve is derived and how individual consumers' reservation prices determine consumer...