- Видео 413
- Просмотров 2 121 344
Harold Walden
Австралия
Добавлен 9 дек 2014
Just a haphazard collection of videos from my day to day existence.
I have been teaching kids for years and I am well aware of how frustrating some teacher can be when they can't change their teaching style to suit their audience regardless of how ineffective their current teaching style might be.
One of my real passions (apart from skateboarding) is learning new things and trying to develop my knowledge to a point where I am able to explain it to others. It doesn't really matter what the topic, if I don't know about it, chances are I will be excited to learn what the subject has to offer.
These videos will not do justice to how fascinating the subjects of mathematics, economics, physics or chemistry really are but they will hopefully help you with the technical aspects of the subjects.
If you are having real trouble with a particular subject or problem, don't hesitate to post a comment and I'll try and explain it to you as well as I can.
Hope it all helps,
Harold :)
I have been teaching kids for years and I am well aware of how frustrating some teacher can be when they can't change their teaching style to suit their audience regardless of how ineffective their current teaching style might be.
One of my real passions (apart from skateboarding) is learning new things and trying to develop my knowledge to a point where I am able to explain it to others. It doesn't really matter what the topic, if I don't know about it, chances are I will be excited to learn what the subject has to offer.
These videos will not do justice to how fascinating the subjects of mathematics, economics, physics or chemistry really are but they will hopefully help you with the technical aspects of the subjects.
If you are having real trouble with a particular subject or problem, don't hesitate to post a comment and I'll try and explain it to you as well as I can.
Hope it all helps,
Harold :)
Calculating Compensating Variation | A Complete Guide
Link to fully worked solution: drive.google.com/file/d/1T7lC8jOLEY8mpB-AJJLJSlDITkI5eyit/view?usp=sharing
References:
CV and EV - Measuring Welfare Effects of an Economic Change
Kevin Wainwright - Simon Fraser University
www.sfu.ca/~wainwrig/Econ200/documents/cv-ev-notes.pdf
Welfare Analysis
Prof. Jay Bhattacharya - Stanford University
web.stanford.edu/~jay/micro_class/lecture8.pdf
Compensating Variation
Syracuse University
wilcoxen.maxwell.insightworks.com/pages/307.html
Consumers' Surplus and Index-Numbers
J. R. Hicks
The Review of Economic Studies
Vol. 9, No. 2 (Summer, 1942), pp. 126-137 (12 pages)
Published By: Oxford University Press
jstor.org/stable/2967665
Compensating Variation, Consumer's S...
References:
CV and EV - Measuring Welfare Effects of an Economic Change
Kevin Wainwright - Simon Fraser University
www.sfu.ca/~wainwrig/Econ200/documents/cv-ev-notes.pdf
Welfare Analysis
Prof. Jay Bhattacharya - Stanford University
web.stanford.edu/~jay/micro_class/lecture8.pdf
Compensating Variation
Syracuse University
wilcoxen.maxwell.insightworks.com/pages/307.html
Consumers' Surplus and Index-Numbers
J. R. Hicks
The Review of Economic Studies
Vol. 9, No. 2 (Summer, 1942), pp. 126-137 (12 pages)
Published By: Oxford University Press
jstor.org/stable/2967665
Compensating Variation, Consumer's S...
Просмотров: 572
Видео
Integration Using u-Substitution - Finding the area between two curves
Просмотров 11510 месяцев назад
Calculation of the area bound between two curves. This calculus video tutorial explains how to calculate the area of the space between two curves. In this video, I present two completely different methods of solving this problem and leave it up to the individual to decide which method they prefer to use. In the video, I also demonstrate the practical use of algebraic long division (for those of...
Integrating a trigonometric function using identities - Exam Question Example
Просмотров 261Год назад
In this video, I'll discuss my process for answering this common integration problem. You'll be required to know your trigonometric identities and how you can use them to simplify trigonometric expressions. As a new teacher in mathematics, I am trying to follow @misterwootube and @3blue1brown and use this platform to spread my maths knowledge to a wider audience. If you're struggling with under...
Unlocking the Hidden Power of Implicit Differentiation and Integration in an Exam
Просмотров 136Год назад
#calculus #implicit_differentiation #ibhl In this video, we'll discuss the hidden power of Implicit Differentiation and Integration in an exam. By understanding the implicit nature of these operations, you can can unlock the power of the function within the question, and perform better on exams! If you're struggling with understanding the implicit nature of trigonometric functions, or you just ...
What are Polynomials? - An Introduction
Просмотров 142Год назад
G’day guys, in this video I am going to introduce you to the basics of polynomials. Polynomials appear in many areas of mathematics and science. For example, they are used to form polynomial equations that mathematically encode a wide array of problems, from elementary word problems to complicated scientific problems. Polynomials, through their use in functional analysis, appear in settings ran...
A Difficult Exponential Question | 16^x+20^x=25^x | Natural Logarithms to Solve Algebraic Expression
Просмотров 2,6 тыс.2 года назад
#algebra #logarithm #mathematics In this video, I go through the method required to solve 16^x 20^x=25^x using natural logarithms. This question involves multiple steps such as factorization, using the quadratic formulae, and finally the use of natural logarithms to solve the initial question. I hope my video helps. Original video from @mathed and @hedacademy Cheers for watching, Harold :) My s...
Implicit Differentiation: Using Calculus to Find Turning Points
Просмотров 3812 года назад
#calculus #implicit #differentiation Implicit Differentiation: Using Calculus to Find Turning Points An exam question example of how you can use implicit differentiation techniques to solve mathematical problems. Other fantastic resources on this topic include; Paul's Maths Notes - Inverse Functions: tutorial.math.lamar.edu/classes/alg/inversefunctions.aspx Paul's Maths Notes - Implicit Differe...
Calculus of Exponential Functions: Exam Question Example
Просмотров 922 года назад
#calculus #mathematics #ATAR This calculus video tutorial explains how to approach a unique exam question which requires students to find the derivative of exponential functions using a simple formula. It explains how to do so with the natural base e or with any other number. This video contains methods for answering the problem with or without a graphical calculator such as a CASIO ClassPad. M...
Exam Question: Integration using a u-substitution
Просмотров 3032 года назад
Integration using u-Substitution With all u-substitution integration problems: The FIRST STEP is to pick your "u". The best choice is usually the longer x-expression that is inside a power or a square root or the denominator, etc (in an "inside function"). Set u equal to this x-expression. The SECOND STEP is to find "du" by taking the derivative of the u expression with respect to x. For instan...
Calculus: Method of Small Increments - Percentage Change (Exam Question Example)
Просмотров 1 тыс.2 года назад
#Calculus #WACE #Exams In this video, I go through how to solve an equation using the method of small increments. I hope it helps :) A spherical balloon is leaking gas. Use the Incremental formula to estimate the percentage change in the radius if its volume decreases from 800 cm^3 to 788 cm^3 My Instagram Account: harrywalden My RUclips Channel: ruclips.net/user/HaroldWalden My ...
Implicit Trigonometric Differentiation: Exam Question Example
Просмотров 1852 года назад
#WACE #Specialist #Calculus An exam question example of how you can use implicit differentiation techniques to solve mathematical problems. Other fantastic resources on this topic include; Paul's Maths Notes - Inverse Functions: tutorial.math.lamar.edu/classes/alg/inversefunctions.aspx Paul's Maths Notes - Implicit Differentiation: tutorial.math.lamar.edu/classes/calci/implicitdiff.aspx Questio...
Chain Rule - Applications of Differentiation - Calculus
Просмотров 2312 года назад
#Calculus #Exam Chain Rule - Applications of Differentiation - Calculus Question: A grandfather clock has a minute hand which is 18cm long and an hour hand which is 12 cm long. Determine the rate at which the distance between the tips of the two hands is changing at 9 o’clock (in cm/min). Okay, so this is a classic example of a related rates question. dy/dt = dy/dx * dx/dt A fully worked soluti...
Assignment 3 - Critical Reflection
Просмотров 1603 года назад
EDUC5537 - Child and Adolescent Development and Pedagogy
Geometric Proof Involving Circles
Просмотров 2643 года назад
#geometry #proofs #WACE The solution begins at 3:00 I hope it helps :) A worked solution is available here: drive.google.com/file/d/1R3YyizH2KB8ZiBo7HNGfF-z5tvVAsRZa/view?usp=sharing When a secant (meeting the circle at A and B) and a tangent (meeting the circle at T) are drawn to a circle from an external point M, the square of the length of the tangent equals the product of the lengths to the...
Integrating Trigonometric Functions (Exam Question Example)
Просмотров 5733 года назад
#Calculus #Integration #Specialist In this video, I go over a question from the 2019 WACE Specialist Mathematics Exam. At first glance, the question seems difficult however, with a few simple integration techniques the problem actually becomes quite simple. The question asks you to use the identity 2sinAcosB = sin(A B) sin(A-B). I hope the video helps. Harold
Applications of Integration: Finding the Equation of a Line Which Creates Two Equal Areas
Просмотров 3354 года назад
Applications of Integration: Finding the Equation of a Line Which Creates Two Equal Areas
Calculus: Applications of Differentiation - Row vs Run Problem (Optimisation)
Просмотров 5684 года назад
Calculus: Applications of Differentiation - Row vs Run Problem (Optimisation)
Using the Radian Measure - Circle Geometry
Просмотров 5114 года назад
Using the Radian Measure - Circle Geometry
Arithmetic Sequences | Exam Question Application
Просмотров 4364 года назад
Arithmetic Sequences | Exam Question Application
Calculus - Evaluating a Definite Integral of a Function in Terms of a Variable Upper Bound
Просмотров 8025 лет назад
Calculus - Evaluating a Definite Integral of a Function in Terms of a Variable Upper Bound
Proving Trigonometric Identities - Exam Questions
Просмотров 6115 лет назад
Proving Trigonometric Identities - Exam Questions
Calculus - Relating Displacement, Velocity and Acceleration Using Derivatives
Просмотров 1,9 тыс.5 лет назад
Calculus - Relating Displacement, Velocity and Acceleration Using Derivatives
Comparative Advantage - Demonstrating the Benefits of Specialisation and Trade
Просмотров 2305 лет назад
Comparative Advantage - Demonstrating the Benefits of Specialisation and Trade
Journal Entries for the Issue of Shares - Exam Example
Просмотров 24 тыс.5 лет назад
Journal Entries for the Issue of Shares - Exam Example
Calculus - Differentiating Using the Chain Rule
Просмотров 6265 лет назад
Calculus - Differentiating Using the Chain Rule
DIY - Installing LEGO Display Shelving
Просмотров 6 тыс.5 лет назад
DIY - Installing LEGO Display Shelving
Calculating the Height of a Geosynchronous Satellite
Просмотров 10 тыс.5 лет назад
Calculating the Height of a Geosynchronous Satellite
Arithmetic Sequences - Complicated Example
Просмотров 1,2 тыс.5 лет назад
Arithmetic Sequences - Complicated Example
Thank you, this was more helpful than the Filipino ones
Perfectly explained, thanks!
Glad I could still be of use
does the horizontal velocity decrease as the vertical velocity increases
No, in situations such as this (no air resistance) the horizontal velocity is assumed to be constant.
@@HaroldWalden thank you haha i commented this at the start of the video then realised that the final calculation was just the constant speed divided by time. so the speed had to be the same the entire time
@@hiyt2581 I have done that before many times. I am happy that the video is still useful to people :)
This is 11 th class question
Sure is 🤓
Tonic waiting for a to change
I don’t understand what you’re trying to say…
There on example 2 why did you divide both sides by $10/100
if you graph AP and the search for the minimum, the x is hour and y is distance.
Not so clear
What part about the video did you not like/didn’t think was clear?
Why are they right angles?
Good question, because the lines are a tangent to the circumference of the circle.
i think the centripial force should be directed towards the radius not away, this is probably a common misunderstanding
Do you have a whatsapp group where we can forward questions? This video was really beneficial thanks alot.
I have an email address: harry.w.walden@gmail.com
Finally a clear explanation on how to calculate total trade after partial specialization. Thank you Harold! :)
So happy that the video helped mate!
super helpful! I cannot thank you enough!
W vid
Thanks ❤
I have one
I'm not a scholar by any stretch, but wouldn't the weight of the car make a difference in a real life scenario?
Hi Paul, in this situation the driver presses down the brake pedal and the car deaccelerates at a rate of 10m/s/s. The deceleration experienced by the car will be commensurate with the force which is applied to the four brake rotors and the mass of the car according to Newtons 2nd Law (F=ma). So, in essence you are right about the mass playing a key role - its just factored into the information provided in the question. I hope this helps. Harold :)
@@HaroldWalden My day job involves testing brakes on cars and light trucks in one of two ways. Firstly; by way of of a brake roller machine where we take the sum of each wheel's effort and divide by tare weight to give a percentage, pretty easy. (50% is considered a pass) Secondly, measuring stopping distance over 7 meters, from 30kph. The car passes if the stopping distance is within 7 meters. I was asked, (during an audit) why I didn't write the percentage onto the check sheet. I'm not educated enough to know the answer, but I feel the answer lies in your video somewhere? Thanks for reading mate 👍
My border collie puppy wont stop eating grass 😭😭
Thats no good.
N=kgm/sn2 Nm=Joule=kgm2/sn2
Why do we calc the -log(H3O) in class😭
It’s exactly the same as calculating the pH using -log[H+] Don’t stress 😀
you've done what my lecturer couldn't do he couldn't give us clear understanding but you've done it
Glad I could help mate! Maybe you should show your lecturer my content. Just to give him another method for describing the concepts. :)
How did you get 9•8
9.8 is the commonly accepted acceleration due to gravity that is used in gravitational potential energy calculations.
0:17
Thank you for explaining it! I finally understand the concept
But how do you know if you found the minimum or maximum. You need to substitute values less and more than the value found to confirm the turning point is an approximate way. Another way is to use second derivative test.
Great point! I definitely should have added that to the video.
thanks a lot
$119.50 A DAY Roberta needs to get me a job at that jewellery shop 😂
😂
My story about my dog: So I was at my besties house and we were playing with stray dogs and then we go to meet the lil pups then one of my friend comes and says she found a very cute dog and thinks she is a breed dog and I wanted to adopt a pup so I went there as fast as I could and there was this border collie and was maybe 1-2 months old so I took him home It was very and the next day- thats today while im writing my bestie calls and says that shes someone else's dog so we have to return him and now I only have a few hours to play with him. Good bye coco I'll miss you
🥺❤️
Helpful
what happens if god 1 has a number lets say max u = 5x^1/2 how would you solve dl/dx??
Tysm bro u helped me with my last minute project.
Most welcome 😊
thank you very much. im now prepared for my math exam. my textbook compared to you is nothing at this point
My teacher did not give me an example of partial derivatives with a trig function in the notes, but he gave me one on the homework. i was confuse; now I get it. Thank you very much for the help!
Thank you sir!
Lovely and neat explainaton. Thank you
You’re very welcome
i was struglling in in prealgrebra until i saw this video its super simple
Just need to right explanation 🤓
One question. How would I know if the initial speed is 0 or it starts at 69.4 m/s? I was confused that how you counted that as 0 as a plane can't start at 0 on air. So every time I got wrong answers have both initial and final v as the same answer.
Great question. Because the question says that the plane is travelling horizontally we can say that the vertical component of it's velocity is zero when the package is dropped. The horizontal component of the package's velocity (if we dont consider air resistance) is constant throughout the package's journey towards the ground and is equal to the velocity of the plane. Only the vertical component of the package's velocity will be affected by the force of gravity. We use the vertical component of the packages motion to determine the total time of the package's journey and the horizontal component of the package's velocity to determine the total horizontal distance it travels after it is released from the plane. I hope that explanation helps. :)
@@HaroldWalden thank you helps a lot
Is there a difference between them when deriving perfect substitutes?
be amharic yiseraln
How can area be negative?
Because it is below the x-axis.
thank you so much! this is the only "angled" plane dropping package problems I could find out there 😂
Glad I could help! If it's the only one - make sure you let your friends of it's existance. :)
I won't lie. I had to re-watch a little bit around 7:30-9:00 BUT once I was able to wrap my head around it this was SO helpful. Thank you so much!
I'm so glad!
Thank you sir
You’re very welcome. I hope the video helped. 🤓
Brilliant!
Glad you like it. The equivalent variation companion video to this is coming in the next day or two.
Two zeros are miss in 300,000,00
I think you are talking about the two zeros which appear after the decimal point. Since they don’t affect the solution to the problem I have chosen to leave them out for convenience. I hope that helps :)
You complicate things to much. Useless?
How would you solve this problem?
8 minutes in, shouldnt -36 actually be -60?
Great spot, it should be but you’ll see it makes makes no difference to the overall solution because we just need to determine whether the second derivative is positive or negative.
I don’t understand why the equation of the circle is x^2 + (y-k)^2 = I don’t understand why the y-k
The y-k shifts the centre of the circle k-units up. Because the x-value of the circle’s centre is zero there didn’t have to be any translation horizontally.
You are the GOAT!
Thank you for the positive feedback, I really appreciate it. If you want my opinion, @3blue1brown is the Tom Brady of mathematics-related content on RUclips.
THIS IS WRONG!
Explain how?