- Видео 295
- Просмотров 556 983
Robert Cruikshank
США
Добавлен 14 окт 2011
Symmetric Difference of Sets is Associative
A short proof, illustrated with Venn diagrams, and using a symmetry argument.
Просмотров: 1 584
Видео
How Beta is Conjugate to Binomial
Просмотров 642Год назад
A derivation of the relationship between prior beta distribution, binomial data, and an updated beta distribution.
The Beta Function: Solving the Defining Integral for integer a,b
Просмотров 267Год назад
The Beta Function (as opposed to the Beta Distribution) is defined both by an integral and as a combination of gamma functions. I show the two are the same for the case of integer inputs. Wikipedia has more general proofs but I thought this case has more straightforward calculus.
CDFs for Exponential Rayleigh Weibull and Pareto Distributions
Просмотров 529Год назад
(revised) I show a pattern in the formulas for a few different probability distributions. These formulas are often scattered in a textbook so I brought them together.
Low Pass, High Pass, or Bandpass Filter?
Просмотров 3 тыс.Год назад
Almost zero math. Mnemonic and explanation for several simple cases of filter networks. This is for grasping the concept.
Counting Radial and Angular Nodes in Atomic Orbitals
Просмотров 1,1 тыс.Год назад
A Two Minute Video with the rules and four worked examples.
From Complex Roots to Real Solutions
Просмотров 115Год назад
Here's a detail that often gets covered quickly in differential equations class. Apologies for the blurriness, I seem to be cursed when it comes to camera technology.
Electric power: Definitions (A Two Minute Video)
Просмотров 131Год назад
Definitions of power, current and voltage, with brief examples. Made for a viewer by request!
![What is E[E[X|Y]] ?](/img/1.gif)
What is E[E[X|Y]] ?
Просмотров 294Год назад
I work a tiny example with numbers and give a symbolic proof at the end. Hopefully this reduces confusion!
Adding Vectors: TLDW Version
Просмотров 63Год назад
Here's the 2.5 minute version of the 16.5 minute video I just posted: ruclips.net/video/bKfto0MKFrg/видео.html Season to taste! #physicstutor #physics #tutoringservices #vectors
Adding Vectors: Every. Single. Step.
Просмотров 110Год назад
This video is long; it assumes very little knowledge, and is meant for students facing most of the ideas for the first time. I have created a TL;DW version that zips through the same thing at 5x speed. ruclips.net/video/5Y79FUVpgUU/видео.html I hope this helps to save students struggling with the beginning of #physics class! #physicstutor #vectors #tutoringservices
A Tricky F = ma Problem from Kleppner and Kolenkow 1st ed
Просмотров 773Год назад
I solve problem 2.19 from K and K in the first 2:30, then problem 2.20 in the rest of the video. linktr.ee/knowledgeoncall robertthetutor.online
Holder Inequality Lemma: A 2 minute proof
Просмотров 6452 года назад
The Cauchy -Schwarz Inequality is widely used; it turns out to be a special case of the Holder Inequality. That in turn depends on this little lemma, which can be proven with a bit of calculus. The proof is mostly taken from Casella and Berger.
Power and Intensity (an example with sound energy)
Просмотров 1462 года назад
I work an example of a speaker emitting sound, and talk about the energy, power, intensity, and sound intensity level (dB). This is another video made with slides and a VoiceOver. These certainly upload faster! I'm still getting the hang of making a voice over, so I didn't fight to trim this one down to two minutes flat.
How Voting Works
Просмотров 602 года назад
Just spelling out things that everybody should already know. Elections are much, much easier than civil war.
Why does the Fourier Trick Work? Using trig not integration by parts
Просмотров 8992 года назад
Why does the Fourier Trick Work? Using trig not integration by parts
Moment and Shear All Along a Cantilever
Просмотров 582 года назад
Moment and Shear All Along a Cantilever
From Physics 1 to Engineering Statics: Cantilever Example
Просмотров 872 года назад
From Physics 1 to Engineering Statics: Cantilever Example
Nodes and Antinodes in an Open Pipe
Просмотров 1,4 тыс.2 года назад
Nodes and Antinodes in an Open Pipe
100 cm^2 is NOT 1m^2! Visual Examples in Metric
Просмотров 6312 года назад
100 cm^2 is NOT 1m^2! Visual Examples in Metric
Hydrogen and Energy (clearing up confusion)
Просмотров 1042 года назад
Hydrogen and Energy (clearing up confusion)
How to Clean a Quadra-Fire 1200-I Pellet Insert (Stove that fits inside a fireplace)
Просмотров 1,8 тыс.2 года назад
How to Clean a Quadra-Fire 1200-I Pellet Insert (Stove that fits inside a fireplace)
Deciphering the Definition of Complete Statistic
Просмотров 1,1 тыс.2 года назад
Deciphering the Definition of Complete Statistic
The Definition of Sufficient Statistic Looks Weird (a 2 minute remake)
Просмотров 8652 года назад
The Definition of Sufficient Statistic Looks Weird (a 2 minute remake)
Great video!
Very well made!
Thank you. Very easy to understand. Brilliantly explained. Respect from Pakistan.
absolutely great video
at 0:31 you say "pressure times volume has the units of work", but the whiteboard says "pressure times the change in volume has the units of work"
Both are true. Volume and change in volume have the same units.
Thanks!!
This video was incredibly helpful! Thank you for posting this.
I can't explain how much it useful for my exams. I was always confused in batteries one. You cleared all my doubts. Thanks a lot from India🇮🇳🇮🇳
Thanks! Also for the current we can choose any direction all the time?
Yes! It's just like choosing a coordinate system, there's no wrong answer. If you get a negative number for your current that means it is actually flowing the other way, just like if you say up is positive and get a negative vertical velocity it means the object is going down. Just be consistent.
Wow, this man can explain quantum physics to a toddler! BTW, how did I get here? Oh yeah, I was trying to learn what the f natural gradient is!!!!
Well, maybe not a toddler, but I did channel Dr. Seuss for it at one point: www.quora.com/search?q=Dr%20Seuss%20quantum
You just showed that a commutative binary function is associative iff it satisfies a stronger form of commutativity. It's the first time I see that idea!
Thanks for clearing my doubt
The field lines of a quadrupole: ruclips.net/video/1I_CGFyK5cg/видео.htmlsi=gUBuYevLHnP9t3JJ&t=371
Indiaa❤
Thanks.
My teacher taught me complex circuit without making my basics clear so i cant understand that but you made my basics crystal clear
Thanku❤
I found your channel googling tesla unit of measurement. Thank you for teaching me this sir.
This helped me out immensely. Thank you!
I would give this 1000 likes if I could. Thank you!
Clear and informative. Thanks
I'm studying to be an actuary, a big thanks to you for making these!
Fantastic Explanation! 😊
Thnxx
Thank you so much.
Bro your a life saver❤
What a wonderfully hel pful diagram - thank you!
Thanks so much!!
I saw this video before 3 month it was help full. But I forgot it. Now this time I searched on RUclips,but you tube don't suggest me so I searched it on Google and found it. Tank you sir
Why not leave the small x's and y's as they are (not take their logarithms), and try to figure out a good enough equation to describe the relation between them using some other way? (I know the result won't be a straight line and won't be a first degree equation).
Because how do you measure a "good enough" equation? The formulas we use essentially say, rewrite the variables until we have a linear relationship, then fit the data to the line, and then if need be transform back. You can skip that if you can come up with a better way of defining "good enough" that is quantitative.
@@robertcruikshank4501 thanks for the reply
I wonder why it took so long for me to find this channel ❤️ Keep it up Mr. Cruikshank!
you are an absolute legend... appreciate your work!!
This is amazing. So simple and straight to the point. Thank you.
Thx, Doc. We in the streets turning up to this one. Using exponential families right now for most sufficient statistic work, but I am hoping to get this theorem down well. Also, you looking sharp, homie. I like the haircut and fit. Fresh.
Stuck on how you got 6.62V @1500resistor. I do .0441*1500 and come up with 66.15. Am I missing something? Thanks.
Good catch! I missed a zero, since .012/e = .00441, not .0441. Since I had it correct on my calculator, my next calculation came out right so I didn't spot my miscopy.
wise person
Thank you ❤
Great job !
Thank you!
This is the best video I've found all year! Much better than just memorizing formulas, now you understand formulas! Thanks!
thank u sir
Thank you Robert. It was a great help in my exam.
Best explanation I've seen of saturated vapor pressure. After watching this video actually things got cleared.
We got dot products giving us vectors before GTA 6
Incredible. Thank you
That helped me. Thank you so much sir
THANK YOU SO MUCH
Watching this 30 mins before my final exam. Thank u 😭😭😭
that was incredibly helpful thank you for making this video!!!!
This is the best explanation of the definition of sufficient statistics I have ever seen. Thank you for sharing this awesome experience.
Thank you! Fair warning, a couple of professional statisticians have contacted me saying I'm wrong on a technicality I don't really follow, saying "parameters are not random variables". It remains true that this is a correct result and an easy way to remember it.
@@robertcruikshank4501 It is true. Thank you for the clarification. That is why I'm Bayesian. Your explanation is great.
Great explanation! ty so much!! :D