Curated Video
The Media Got The Math WRONG - The Golden Ratio
15-year old Joseph Rosenfeld thought he spotted an error in the Boston Museum of Science. The exhibit Mathematica has a sign that says the golden ratio is (√5 - 1)/2. He remembered and checked online that the golden ratio is supposed to...
Let's Tute
Preparing Departmental Trading and Profit and Loss Account
In this video, the teacher explains how to prepare departmental trading and profit and loss accounts. They go through a specific question and discuss the allocation of expenses between departments based on various ratios and factors such...
Examrace
NCERT Class 12 Macroeconomics Chapter 3: Money and Banking (Dr. Manishika) | English
Dr. Manishika Jain in this lecture explains fundamentals of economics mainly macroeconomics - Money and banking - CRR, SLR, Outright, Cash reserve ratio Medium of exchange No use in an island With 1 economic agent – transaction begins...
Curated Video
Proving e = 2.718... Is An Irrational Number (3 Methods)
A rational number can be written as a ratio of two integers a/b. An irrational number cannot be written as such a ratio. Euler's number, e = 2.718.., is an irrational number. This video illustrates 3 methods to prove e is an irrational...
Curated Video
Calculating the Force Exerted by an Object on a Table
This video shows the process for solving the problem presented in IGCSE A June 2018 paper 2HR Q2, which involves force. By using the formula for pressure and the given dimensions of the rectangle, we will work through the steps to...
Brian McLogan
Finding the slope between two points why does the slope formula work
👉 Learn how to find the slope between two points. The slope of a line is the steepness of the line. The horizontal line has a zero slope while the vertical line has an undefined slope. To determine the slope of a line passing through two...
Curated OER
Banking 15: More on the Fed Funds Rate
Going deeper into the concept of the Federal Funds Rate, this video guides viewers through the process of inter-bank lending, much like the previous video (Banking 14). Sal's easygoing approach is simple to understand and fun to watch.
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How Do You Convert a Rate To A Unit Rate?
What is unit rate? How is a ratio converted to unit rate? Really, it's just about getting the denominator of a ratio to be 1. When the denominator is 1, the ratio is a unit rate. Check out this video as the instructor illustrates a few...
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How Do You Use Dimensional Analysis to Convert Units on Both Parts of a Rate?
The video just before this lesson showed how to do unit analysis and rate conversions. This lesson also shows conversion of unit rates, feet, miles, seconds, hours. So pay attention and learn how to figure out how many feet per second...
Curated OER
Banking 16: Why target rates vs. money supply
Using dual diagrams and workspaces, Sal provides a thorough explanation of target rates and money supply. Your class will appreciate his anecdotal approach to explain how interest rates are set, and how it affects potential "consumers of...
Curated OER
Banking 14: Fed Funds Rate
With bright, simple diagrams, Sal explains the role of the Federal Reserve as it relates to lending rates between banks. He discusses open market operations and the way the "Fed" connects to Congress and the U.S. Government.
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Basic Rate Problem
A simple rate problem is looked at in this video. The listener needs to compute whether four trains each going different distances over different amounts of time are moving at the same constant rate. This problem reinforces ones basic...
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How Do You Find the Rate of Change Between Two Points on a Graph?
The instructor uses a graph representing time and distance to illustrate how to solve this word problem. She explains each step: rate of change, distance, time, vertical change over horizontal change, change in distance, and change in...
Curated OER
How Do You Solve a Word Problem Using Unit Rates?
Here's a real-world word problem. It involves walking for a certain amount of time. There are some given values to use. So take the given values, set up the ratio and then convert that to a unit rate value. Now use this unit rate to get...
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Banking 6: Bank Notes And Checks
Why carry around a heavy suitcase full of gold when you can write a check to your neighbor in the village? Sal's village banks flourishes in this video with the introduction of checks, demonstrating how a check essentially works. While...
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Banking 11: A reserve bank
Exploring a world with more than one bank, Sal illustrates the balance sheets of each fictional bank, as well as explaining the possible problems that could result with inconsistent reserve ratios requirements. The video details how one...
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The Discount Rate
What happens when a bank out lends its reserves? Sal answers this question in a video about the discount rate, explaining that it is for the "lender of last resort" and outlining possible circumstances surrounding the need for such a rate.
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Repurchase Agreements (repo transactions)
In one of his most clear-cut and simple presentations, Sal discusses the difference between collateralizing a loan and creating a purchase agreement. With an example of a watch and a kidney transplant, the video thoroughly explains the...
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Banking 7: Giving out Loans without Giving out Gold
Can a bank issue endless loans and checking accounts without regard to the amount of money within its walls? Sal addresses this question throughout the lecture, where he introduces the concept of bank regulations - specifically reserve...
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Banking 10: Introduction to leverage (bad sound)
Demonstrating not only the working definition but the mathematical model of financial leverage, Sal shows viewers how leverage can keep a bank safe - or multiply its losses. Particularly helpful for a class session about bank regulation...
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Federal Reserve Balance Sheet
With an actual balance sheet from the Federal Reserve (from 2007, before all of the "banking silliness" began to happen), Sal walks viewers through the assets, liabilities, and equity of the Fed. Pupils will be pleased to see how the...
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Banking 17: What happened to the gold?
Learn the value of a dollar in this video, which explains the natural transition from the gold standard. Asking viewers if they would trust gold or the U.S. Government, Sal explains how the concept of wealth has shifted and adapted...
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Banking 12: Treasuries (government debt)
Taking viewers through the process of creating a reserve bank (Federal Reserve), Sal introduces the idea of government involvement in modern banking. Additionally, he explains the obligation of the government to cover the reserves, and...
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Banking 1
As an introduction to the institution and function of banks in society, this video walks viewers through the concept of banking with colorful annotations and simplified narration. The lecture evolves naturally into a discussion about...