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Matthew Johnson
Приєднався 16 жов 2011
Math, electrical engineering and physics videos created with technology such as animations and a lightboard with some post-processing to make sure the content is delivered in a timely manner.
70 in the bible (including the Daniel 9 prophecy)
Have you noticed the number 70 is found throughout the bible in both the old and new testament? Here I unpack some of those and attempt to explain why the number is used and draw connections between it's use in various places in the bible, with a particular focus on its use in the book of Daniel, chapter 9.
In a prior video I had discussed the number 12 in the bible It is found most prominently as the number of tribes, which form the basic structure of the Old Testament, And as the number of disciples of Jesus, who founded the early church Well, it turns out the number 70 is involved there too.
Recall when the twelve tribes, or at that time, just the sons, of Israel, entered Egypt? As you might imagine, they weren't children at the time, and it wasn't just Israel's immediate family that went into Egypt, it was his extended family including grandchildren, and did you know their were a total of 70 of them at that time? And fast forward a bit to the 12 disciples, or followers of Jesus. It appears Jesus had a sort of inner circle of 3 disciples he was closest to, including James, John and Peter. Well, he also had a sort of outer circle of followers that weren't as close as the 12, and guess how many there were? Yep, 70. So in this way it appears 70 is connected to the number 12 as this size of this next outer ring from both the tribes and the disciples.
It's used several other places in the Hebrew scriptures for the number of sons prominent leaders had, or the number of leaders of Israel, and in other symbology, but why 70?
One reason is it is described as the life span of a man. Psalm 90:10 The years of our life are seventy Isaiah 23 Seventy years, like the days of one king As a sort of an addendum I also discuss the mathematical or scientific basis or significance for the significance as it relates back to the ancient year of 12 months of 30 days each for 360 days/year.
The number is perhaps most prominent in the prophecy recording in the book of Daniel, chapter 9. I describe how the '70 weeks' in this chapter corresponds to 490 years of disobedience by Israel, 70 years of captivity in Babylon, and 70 'weeks' of years until the Messiah comes and sets everything right.
I conclude by noting the fulfillment and significance of this prophecy, and about how Isaac Newton wrote about it. Hope the video is helpful, take care, -Matthew
In a prior video I had discussed the number 12 in the bible It is found most prominently as the number of tribes, which form the basic structure of the Old Testament, And as the number of disciples of Jesus, who founded the early church Well, it turns out the number 70 is involved there too.
Recall when the twelve tribes, or at that time, just the sons, of Israel, entered Egypt? As you might imagine, they weren't children at the time, and it wasn't just Israel's immediate family that went into Egypt, it was his extended family including grandchildren, and did you know their were a total of 70 of them at that time? And fast forward a bit to the 12 disciples, or followers of Jesus. It appears Jesus had a sort of inner circle of 3 disciples he was closest to, including James, John and Peter. Well, he also had a sort of outer circle of followers that weren't as close as the 12, and guess how many there were? Yep, 70. So in this way it appears 70 is connected to the number 12 as this size of this next outer ring from both the tribes and the disciples.
It's used several other places in the Hebrew scriptures for the number of sons prominent leaders had, or the number of leaders of Israel, and in other symbology, but why 70?
One reason is it is described as the life span of a man. Psalm 90:10 The years of our life are seventy Isaiah 23 Seventy years, like the days of one king As a sort of an addendum I also discuss the mathematical or scientific basis or significance for the significance as it relates back to the ancient year of 12 months of 30 days each for 360 days/year.
The number is perhaps most prominent in the prophecy recording in the book of Daniel, chapter 9. I describe how the '70 weeks' in this chapter corresponds to 490 years of disobedience by Israel, 70 years of captivity in Babylon, and 70 'weeks' of years until the Messiah comes and sets everything right.
I conclude by noting the fulfillment and significance of this prophecy, and about how Isaac Newton wrote about it. Hope the video is helpful, take care, -Matthew
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Відео
Why are there 12 notes?
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It turns out we have 12 notes in western music, but why? Well, 12 is a very important number in our solar system, calendar, how we tell time and several religions as well. I got interested in the prominence of this number and made videos on the former subjects, and this is the final video with regards to 12 in music. 12 is a ‘superior highly composite number', 1 in only 10 such numbers between ...
Why the Number 12 is Prominent in Various Religions
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This video follows up on a prior video regarding the number 12 and how we tell time, and is followed by a video on the the number 12 in music. The focus here is on the usage of the number in various religions, including Astrology, Judaism, Islam, Christianity, and Greek Mythology. I argue the prominence is based on 12 lunar cycles in a year. From the Hebrew Scriptures I discuss Abraham and his ...
Why the number 12 is used to tell time
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The number 12 shows up prominenty in our calendar, how we we tell time, several major religions, and even in music. This first video is on the science behind it, The second one regarding its usage in religions And the third it's usage in music, which gets a little more mathy And what I'd like to argue is that this number showing up is not a coincidence There is a reason behind it, Before we get...
How Low Pass Filters Work using a Resistor and Inductor (RL)
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If you'd like to understand how a low pass RL filter works, you have come to the right place. I show how they work using the falstad circuit simulator, and first giving a quick review on how inductors work. By the end of this video you can see how taking the voltage across the resistor instead of across the inductor, we get basically the opposite effect as a high pass RL filter. This same RL ci...
How High Pass Filters Work using a Resistor and Inductor (RL)
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This video gives visual demonstrations of how inductors and high pass filters work. It shows the circuit, the equations, the time-varying inputs and outputs, and the frequency response plot. The inductor is sort of 'storing up the current' Current eventually flows through like it's a wire or short circuit This is of course opposite of a capacitor, which initially allows current, then stops it N...
How High Pass Filters Work using a Resistor and Capacitor (RC)
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I explain how high-pass RC filters work using the falstad circuit simulator and a circuit which is similar to the one used with the low pass filters in a previous video. The simulations include the circuit diagram showing current flow, capacitor operation, time-domain voltage plots at various frequencies, and a frequency response plot. Below is the text of the code I used in Falstad: $ 1 0.0000...
What is the D chord? Why do A and F# go well with D? Answered graphically with math.
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Perhaps you know that the D chord consists of the first (tonic) the 3rd (mediant) and 5th (dominant) notes. The first note is D itself, the second most important note is the 5th 'A' note and also important is the 3rd 'F#' note. But why are these notes important, and why do they sound nice when played together, and why do we call this the D chord, and not the A or F# chord, since they are both p...
Introduction to analog to digital conversion
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This video introduces the basic concept of analog to digital conversion. I start by providing some motivation for such a conversion. I then plot out an example analog signal in the time domain, then discretize the signal in the dimensions of time (x-axis) and voltage (y-axis). I then show how we can find the closest discrete voltage value for each time interval, and how that value is transcribe...
How to solve for amplification and gain in a transducer (thermometer example)
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Basic introduction to transducers and a quick example of amplifying a microphone signal to a computer speaker. Below is the basic format: Sensor to electric signal amplify electric signal and change bias - thermometer output thermocouple amplify electric signal and change bias - thermometer output 2 to 4 mV corresponds to 0 to 100 degrees Celsius amplify electric signal and change bias - thermo...
Introduction to transducers and simple example of amplifying from microphone input to speaker output
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A basic introduction to transducers is provided along with solving for the amplification required in a basic transducer between a microphone input and speaker output. Below is basically what's covered. A transducer converts energy from one form to another Or it is "a device that converts variations in a physical quantity, such as pressure or brightness, into an electrical signal, or vice versa"...
How to convert 120 Vrms AC to 5 V DC (like AC to DC conversion for a USB charger)
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This video demonstrates a rudimentary circuit animation for converting from 120 Vrms AC to 5 V DC (like AC to DC conversion for a USB charger). The falstad circuit simulator is used to demonstrate. Below is the basic script: o the goal is to get about a constant 5 V DC output here from the usb side, but the challenge is we are plugging this directly into the wall at 120 Vrms. So let's go ahead ...
Introduction to transformers
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I discuss the following: why transformers are important, basic physics of transformers, circuit depiction of transformers, how N values affect current and voltage transformation, how transformers work with a DC source, and a simpler depiction of circuits with transformers.
What is RMS Voltage? A mathematical explanation.
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A partially graphical but mainly mathematical explanation of how we get the equation for RMS voltage
What is RMS Voltage? A graphical explanation.
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This video provides a graphical explanation of what RMS voltage is and why it ends up being basically the peak voltage divided by the square root of 2. The video uses some DESMOS plots to show how a sinusoidal voltage corresponds to power and energy, how that energy compares to the energy generated from a DC voltage source, and backs up to finding a comparable equivalent voltage, or RMS voltage.
Finding Voltage using Kirchhoff's Voltage Law (example problem)
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Finding Voltage using Kirchhoff's Voltage Law (example problem)
Introduction to Kirchhoff's Voltage Law
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Introduction to Kirchhoff's Voltage Law
Choosing an electric vehicle with a decision matrix
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Choosing an electric vehicle with a decision matrix
Derivation of Doppler Equation for RADAR
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Derivation of Doppler Equation for RADAR
Finding current through RLC circuit including resistor, inductor and capacitor
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Finding current through RLC circuit including resistor, inductor and capacitor
Calculating efficiency of a DC motor
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Calculating efficiency of a DC motor
How a DC motor works: basic explanation of the genius behind it
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How a DC motor works: basic explanation of the genius behind it
Intuition behind Voltage, Current, Resistance and Ohms Law
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Intuition behind Voltage, Current, Resistance and Ohms Law
Intuition behind the Divergence Theorem (why it's true)
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Intuition behind the Divergence Theorem (why it's true)
Excellent explanation professor. Thank you very much 🙏🏻🙏🏻🙏🏻 🇮🇳♥️🇺🇸
Nice
This comment is from India 🎉❤ thanks allot
The capacitor charge/discharge cycle explanation was a little hand wavey. Would have been good to slow down the animation - I get what the result is, but not sure I’m getting it ‘intuitively’ enough to explain it.
Great!
Amazing demo
This helped a ton, thank you!
Watching the B-1 Lancer dropping bombs while going supersonic got me curious about the math behind the trajectory. Thanks for the video!
Wow, you could teach this in kindergarten, it's so simple and beautiful!
Great explanation, but how do you prove that theta prime 2 = theta 2? I cant seem to find an angle that adds to both to equal them to 90 degrees
@@maaarx1158 Hi, it’s similar to how you show that theta1 prime = theta 1. You can just use, say, B as the angle between the second theta2 I drew and the horizontal line, and you know they have to add up to 90 degrees. Also you can also see that B + theta2 prime +the 90 degree corner must = 180 for a triangle. Therefore theta2 prime + B = 90, therefore theta2 prime = theta2.
one of the best videos .. i ever seen in my life genius 👌🌹
🌹
@@leo3.14 you had mentioned something about us being called to adventure in this life and yes I agree, just like Abraham was called out of his country and father’s house to embark on an adventure to receive God’s blessing and promise.
🌹👌
Thank you so much! So helpful and you make it easy to understand
Good explanation, thanks.
wow very cool
4 years of university study explained in a 8 minute video. Bravo sir!!
@@stefangrozdanovic4908 thanks my man
Awesome explanation, thank you 🎉
Proof on my tik tok and my facebook page
In 2026 the world will be exactly 6000 years I think in 2026 on trumpet day tishri 1st Yahusha hamashiach coming back to put his 1000 year reign on earth. I got proof on my page Adam was created in 4004bc Yahusha was born in 30bc/0Ad Yahusha died in 33ad Right now we in 2024 ad Yahusha died 1991 years ago on cross Yahusha was born 2024 years ago in 1 Ad 30 bc
33 ad is right
Correct me if I am wrong, but the video DOES NOT elaborate further the dot product intuition introduced in 3b1b video right?
I discuss the dot product a little bit at the 2:19 mark.
excellent explanation
smart people should ask this in low pass filter in order to understand why his explantion is wrong* : 1. the capcitor is fully charged when the input frequency is low like 20hz, ok and simple to understand, nothing complex... then 2. when frequency input is very high like 500hz then the capcitor just dont fully charged but way less because of the speed of the input frequency...mean the capacitor start to charge him self and suddnely the source go off state, hence not fully charged, in different words.... which mean according to his explantion in the first situation the capcitor is fully charged and in the second example the capcitor is just dont fully charged lets say half.....ok up to this point everything is simple to understand...here the problem comes.... then someone smart ask but hi, the frequency stay the same its just the capcitor dont charged fully and the output of the capcitor also the same charge he charged... then how the hell its filter high frequencies ?????? low pass filter mean this...for example the input is 1000 hertz(1khz) mean 1000 cycles per second and after it pass the circut its 200 hertz, mean 200 cycles per second, mean less cycles per second...which mean ......that the capcitor dont charged every time but miss alot of the cycles and hence the output its lower frequency...other wise according to his explantion you dont filter out frequencies...but just output half the input, but frequency is the same
the resisitor is just constant suck in electrons and output them as heat.....
Fun and instructive.
5:45 k hat literally appears out of nowhere. is it meant to represent the tangent at any point on the line?
Yeah that did magically appear out of my k-hat. Don’t have an immediate answer for you as I’m not teaching anymore. I’d like to get back to you later though.
@@matthewjohnson2554 ok, that sounds good. likewise, if I find an appropriate answer, I'll reply back here, too. Thank you so much, and fantastic video.
@@matthewjohnson2554 I found in my textbook (Briggs 3rd ed.) p 1108, *k* is the z-axis unit vector = <0,0,1>, and to find a unit vector *n* in the xy-plane normal to C and orthogonal to *T* (unit tangent vector I think) and *k* , then *n* = *T* x *k* (cross product) Maybe this is what's going on.
@@EmpyreanLightASMR Hey so the k hat is there to specify that the curl of a vector field in the x,y plane would be defined in the perpendicular z plane. If you prefer to ignore the k-hat that’s fine. The explanation I’m giving doesn’t really depend on the k-hat, it just specifies the curl is technically in the z direction.
One of the best explanation.
Thanks. That is beautifully clear!!
That was very good explanation. i can see how much you have work hard to explain and did good work out of brain
you have 12 likes on this video :D
Perfect, now I just need to lock the likes, 13th would be bad luck!
Or you can have a mosfet acting as a switch right?
Omg thank you so much you don't know how many videos I watched and this one just clicked
Brilliant!
You are a star!
great video man
Thanks!
very good! thanks
sir actually its not clear that which one is thita2prime can you please just state it
@@singingloverbyayush6234 hi if you see my explanation on the comment above maybe that helps.
Thank you for the tutorial, it was helpful!
nice
Great tutorial! 👏👏
Very clear
Best explanation so far
Thanks sir
✨✨👌🏻👌🏻
You just opened my eyes, thanks so much man
were you being held at gun point??
Nope, why?
Great explaination! Additionaly it would have been interesting to change the value of the resistor. My question I ask myself is: which frequency should I set the filter for a DC Signal to filter out noise on the ADC input of my esp8266. Can it be too low? Ist it better to use a big resistor or a big capacitor to get a specific frequency?
awesome,but how does compression work with light if electromagnetic waves do not need any particle to propagate?i mean how do we see this effect with electromagnetic waves?
The Doppler effect is based only on the speed and the wavelength of the wave. I suppose though it would also be dependent on how fast the wave travels. Sounds travels at a certain speed through air just like light travels at a certain speed depending on the index of refraction.