The March of Time
1945: OCCUPIED WAKE ISLAND: VS United States Major Colonel Walter Baylor (unconfirmed) arriving on Wake Island, various Japanese soldiers standing at attention, U.S. soldiers raising American flag, Japanese soldiers saluting. WWII surrender
MOT 1945: OCCUPIED WAKE ISLAND: VS United States Major Colonel Walter Baylor (unconfirmed) arriving on Wake Island, various Japanese soldiers standing at attention, U.S. soldiers raising American flag, Japanese soldiers saluting. WWII...
The March of Time
MOT: 1938: Nazi surveillance and persecution of the German population
Woman meets with Nazi officials as informant, men sitting in jail, women answering questions, ID card closeup, concentration camp.
NASA
Water Released from Moon During Meteor Showers
Scientists have discovered that water is being released from the Moon during meteor showers. When a speck of comet debris strikes the Moon it vaporizes on impact, creating a shock wave in the lunar soil. For a sufficiently large...
Curated Video
Titration Calculations: Understanding Concentration and Molar Concentration
The video is a lecture on titration calculations. The video is divided into two parts, with the first part focusing on concentration and molar concentration. The professor explains the concept of concentration and how it is calculated...
Catalyst University
A&P I Lab | Exercise 3a: Diffusion, Osmosis, & Diffusion Rate
A&P I Lab | Exercise 3a: Diffusion, Osmosis, & Diffusion Rate
The March of Time
MOT 1951: IRAN
WS Iranian soldiers troops standing at attention behind artillery lined up for for inspection American US officer inspecting weapon talking w/ Iranian soldier (no SOT) / MOT 1951: IRAN AIR FIELD: Military truck passing FG airfield...
NASA
MAVEN Explores Mars to Understand Radio Interference at Earth
NASA’s MAVEN (Mars Atmosphere and Volatile Evolution) spacecraft has discovered “layers” and “rifts” in the electrically charged part of the upper atmosphere (the ionosphere) of Mars. The phenomenon is very common at Earth and causes...
Professor Dave Explains
IIT/JEE Chemistry Practice #9: Molarity/Molality
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!
The March of Time
MOT 1941: BRITAIN TASK FORCE AT SEA
NIGHT: (POV Deck) Britain Navy ship at sea VS Silhouette of sailor looking through binoculars VS Norwegian soldiers & sailors on deck, smoking, at attention LA MS Lookout men, binoculars.
Curated Video
Factors Affecting the Rate of Reaction
The video discusses the factors that affect the rate of chemical reactions. The first factor is the number of collisions with enough energy to react. Other factors include changing the pressure, concentration, surface area, and...
Curated Video
Calculating Concentration Ratios in Oligopoly Markets
This video is about calculating concentration ratios in a market, especially in an oligopoly. The video explains what concentration ratios are, how they help understand the market structure, and how to calculate them for different...
Professor Dave Explains
IIT/JEE Chemistry Practice #11: Moles/Molarity
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
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: 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
Practice Problem: Initial Rates and Rate Laws
To figure out the rate law for a reaction, we have to gather kinetic data. We can't know just by looking at the balanced equation. Let's practice using initial rates data to determine the rate law for a reaction!
Professor Dave Explains
Practice Problem: Henderson-Hasselbalch Equation Calculations
David Hasslehoff did chemistry?! No wait, Hasselbalch. And Henderson. Anyway there's this equation, and it relates the pH of a buffer solution to the pKa of the acid and the ratio of the concentrations of the acid and conjugate base....
The March of Time
Partisans militia British officer
MOT 1944: ITALY: PARTISANS: WS Italian partisan military men at attention British officers (L). VS Italian soldiers w/ weapons helmet standing at attention. VS British officer inspecting soldiers saluting. WWII militia
Professor Dave Explains
Practice Problem: Dilution Calculations
Dilution calculations are easy! We just need to know about the concept of concentration, and then the equation M1V1 = M2V2. Try some examples!
Curated Video
Practical Data Science using Python - Support Vector Machine Concepts
This video introduces you to Support Vector Machine concepts. This clip is from the chapter "Advanced Classification Techniques – Support Vector Machine" of the series "Practical Data Science Using Python".This section explains advanced...
Catalyst University
Buffers: Henderson-Hasselbalch Proof pH=pKa
Proof that pH=pKa when conjugate acid and base concentrations are equal; proof that conjugate acid and base concentrations are equal when pH=pKa