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tedszy problem solving
เข้าร่วมเมื่อ 12 มิ.ย. 2018
Mathematics, physics, computer science problem solving and tutorials.
วีดีโอ
Circle of attraction
มุมมอง 3876 ปีที่แล้ว
There is a point between the Earth and the Moon, called the Attraction Point, where gravitational forces are equal. It turns out that there are many such points and we show that they form a circle. A classic problem that combines astronomy, physics and geometry in beautiful ways.
Mass of the atmosphere
มุมมอง 9196 ปีที่แล้ว
Estimate the mass of Earth's atmosphere and use that to find the ratio of the planet mass to it's atmospheric mass.
Size of water molecule
มุมมอง 4.1K6 ปีที่แล้ว
Estimate the size of water molecules from density, molar mass and Avogadro's number.
Combinatorial arguments 5: examples
มุมมอง 1726 ปีที่แล้ว
Some examples of special-object counting symmetries in Pascal's triangle.
Combinatorial arguments 4
มุมมอง 696 ปีที่แล้ว
Continuing the examination of mind-boggling symmetries within Pascal's triangle using combinatorial arguments.
Combinatorial arguments 3
มุมมอง 1336 ปีที่แล้ว
Using combinatorial arguments to find symmetries in Pascal's triangle. The case of two special objects (p=2).
Combinatorial arguments 2
มุมมอง 5376 ปีที่แล้ว
Exploring the remarkable symmetries of Pascal's triangle with Jim and Bob and combinatorial arguments.
Why are they named that way?
มุมมอง 606 ปีที่แล้ว
Some trigonometry functions have the prefix co-, like cotangent . Some don't, like secant. Why is that? Here's one way of looking at it.
Comparing trig functions
มุมมอง 1316 ปีที่แล้ว
We compare sin, cos, tan for two different triangles. A great series of exercises to de-confuse you about trigonometry!
Combinatorial arguments 1
มุมมอง 2.3K6 ปีที่แล้ว
What are combinatorial arguments? Watch an introductory example: derivation of a fundamental property of binomial coefficients.
multiplicative groups: example
มุมมอง 6K6 ปีที่แล้ว
We study the set of positive residues mod 7 and show that they form a group under multiplication mod 7. A prelude for the general case of mod p.
GCDs and linear combinations 4: conclusion
มุมมอง 1516 ปีที่แล้ว
We prove that the greatest common divisor of a, b can be expressed as a linear combination of a, b. We also explore the implications of this for coprime numbers, and end off with a couple of exercises.
GCDs and linear combinations 3: subgroups of Z
มุมมอง 826 ปีที่แล้ว
Continuing the turorial on GCDs, linear combinations, and groups. All additive subroups of Z are groups of multiples, dZ. In other words, the only additive groups made of integers are the dZ type of groups, including Z! The proof of this remarkable little theorem is as beautiful as the theorem itself.
GCDs and linear combinations 1: introduction
มุมมอง 1906 ปีที่แล้ว
Part one of the tutorial series on GCDs (greatest common divisors) and linear combinations. The GCD of two numbers can be written as a linear combination of those two numbers.
Equal velocity collision: inelastic case
มุมมอง 306 ปีที่แล้ว
Equal velocity collision: inelastic case
The Fibonacci staircase 6: final analysis
มุมมอง 656 ปีที่แล้ว
The Fibonacci staircase 6: final analysis
Great explanations!
Beautiful example of approximation in physics. Did you watch Lawrence Krauss lecture "A secret life of a physicist" by any chance? 😁
Also, the x and y axes do not need to be perpendicular to each other. and you drew curve concave up but i think it should be concave down, thanks for the video
good stuff. more people should see this.
gg
Ok here is my question?...I watch a Video about the Circle of Attraction n' I don't remember my comment!..then youtube email me about it..n' other people from other countries made their coments....etc etc...I just want to read my comment again !..n' now U are showing me all of this Geometric Calculations n' I'm gegtting more confused??...its beautifu.!..I'm go back to my High School classes!!...thank you for all your class...I'm deeply grateful...Good Night..😅
Yo Mr. White thanks for the explanation
science bitch
wow this was amazing and very helpful! Huge thanks :D
This was great
This video helped me to intuit the way in which modulo works further, and introduced me to the concept of permutation.
cleared things up. Might be old news, but when i did the Multiplication table for P = 11, i noticed that you only need to compute the first entry for each row. Once you have the first entry you can add the number you multiply with to the one left to it (if it goes over your P keep on counting from 1) So if you are doing the row 3 for P = 11 its 3 6 9 1 4 7 10 2 5 8 I did not know this before, so i was pretty happy about finding it.
Awesome explanation! Thanks!
you should be a narrator man.
thank you
masterful explanation!
Thank you!
what if we want to calculate a molecular size of siderophores? i have no information on density, how can i calculate?
thank you!
Brilliant work
Add more videos on group theory #It's a request
Thanks alot 🤗
After 50 plus years of Engineering graduation I am brushing up doing it all over again, with the help of many sources on TH-cam ... I found your channel, just by chance, and let me tell you ...it is awesome your way of teaching is fantastic in all of your videos. It is unbelievable having so few viewers and subscribers... Cheers
It seems Avogadros # is 6.02 x 10 to 23, but the most important is the reasoning...
TBF, he did use kmol, so the magnitude should be 26.
Damn! This was awesome sir
Wow
Super helpful and clear video, thanx a lot!
You're welcome.
Where is combo arguments 2? I need it!
You got it... th-cam.com/video/gRoPO0W9Kcc/w-d-xo.html
^^ Nice
Awesome video sir , plz keep making such videos .
Thanks. New one coming soon.
hello teacher.I come from Saengthong Vitthaya School but now l'm at Hatyaiwitthayalai school M.2/5
I know that because I don't watch k-pop **triggered**