Physics Peer
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How to calculate a cross product | Matrix-determinant cross product | Cyclic Cross Product
Calculating the cross product of two arbitrary vectors isn’t exactly easy to do with the magnitude formula absin(theta) and the right hand rule. Instead, we need more exact mathematical methods to do it.
This video covers two such methods. The first method is the matrix-determinant method, in which the two vectors are put in the second and third rows (respectively) of a 3x3 matrix. The first row is filled with the unit vectors x hat, y hat, and z hat. Take the determinant of this matrix, and you get the cross product!
The second method is a method based on the Right-hand rule. Here, you treat the vectors as polynomials, and foil out or multiply the individual components of each vector. To determine the directions of the cross products of the unit vectors in your expansion (ie x hat x z hat, etc.), you can use the right hand rule or use the cyclic shortcut. The cyclic shortcut assembles x hat, y hat, and z hat in a sort of cycle and tells you that if you take the cross product of any two of the vectors in the direction of the cycle, you’ll get the third, “unused” unit vector in the positive direction. If you take the cross product of any two of the vectors opposite the direction of the cycle, you’ll get the third, “unused” unit vector in the negative direction.
0:00 The why
0:56 Matrix - Determinant Method
3:00 Calculating a Determinant
6:03 Example with Matrix Determinant Method
10:15 Cyclic Right Hand Rule Method
14:41 Example with Cyclic RHR Method
18:51 Outro
มุมมอง: 513

วีดีโอ

Right Hand Rule #2 | Axis-Circulation | Magnetic Field around Wire
มุมมอง 4592 ปีที่แล้ว
In this video, I'll discuss what's known as "Right Hand Rule #2." This right hand rule helps us figure out the direction of circulation about some axis. What might you ever need that for? 1. Making sense of the rotation direction of torque 2. Applying Stoke's Theorem in Vector Calculus (discussed in a Calc III course) 3. Determining the direction of concentric circle magnetic field lines around...
How to do the Right Hand Rule for Cross Products | All Three Methods!
มุมมอง 13K2 ปีที่แล้ว
In this video, I will explain ALL THREE methods for the right hand rule (RHR) for cross products! This includes the... 1. Index finger, middle finger RHR 2. Curl Fingers RHR 3. Palm-push RHR Note: There is another right hand rule that's used for something other than cross products (it's the one where your curl your fingers and tick out a thumb, used for circulation, the magnetic field around a ...
Cross Product Intuition | Dot Cross Convention | Torque Meaning | Into and Out of Page
มุมมอง 1.4K2 ปีที่แล้ว
What on Earth is a cross product?!?!? That's the question we answer in this video. This video discusses what a cross product is: a vector operation that multiplies two vectors to return a third vector perpendicular to the first two. The video also introduces the basic formula for the magnitude of the cross product (the full vector formula of the cross product will be covered in another video). ...
Dot Products | Vector Projections | Physics Peer
มุมมอง 3012 ปีที่แล้ว
Follow Along Notes: acrobat.adobe.com/link/track?uri=urn:aaid:scds:US:454ab1d5-da6b-313c-8c09-6c94e9e5a012 In this video, I give a (really) in depth description of the dot product. Dot products are one of the most fundamental vector operations in physics, and are essentially a way of multiplying two vectors (quantities with magnitude and direction) to get back a scalar (magnitude only). In esse...
Vectors | Vector Addition and Subtraction | Component Form | Magnitudes
มุมมอง 6513 ปีที่แล้ว
Download and print follow along notes here: documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:c9bc3354-6fa8-4d02-8c18-c1698698b2a0 In this video, we cover… Vector Addition through the tail 2 tip method 2:32 Vector addition with the parallelogram method 4:19 Several Examples 5:45 The motivation for vector addition 13:20 Vector component form 16:55 More Examples 18:30 Vector Magnitudes 23:4...
Update Video
มุมมอง 4393 ปีที่แล้ว
Uhhhh... where do I start? Well I need to apologize I've been gone for a few days. I mean a few months. I mean almost a year. Yikes. I don't have a good excuse. I recorded this video in December 2020 that's how long it's taken me to edit!!! AAAHHH! But I promise. I'm coming back with new content ASAP. I do not take you guys for granted, and I love you all! Your support is amazing. I do disclose...
This Galaxy Wants to Eat Us! | The Andromeda Galaxy
มุมมอง 6564 ปีที่แล้ว
Edit: So apparently I pronounce Andromeda completely wrong. Whoops. Maybe it was a test. If you're reading this, you probably passed. The Andromeda galaxy is the galaxy closest to our own Milky Way. And like any good neighbor, it wants to eat us. In 4 billion years, the Andromeda Galaxy will collide with our Milky Way. How do we know this? We can analyze the light emitted from the Andromeda Gal...
Everything you need to know about the sun
มุมมอง 3384 ปีที่แล้ว
If there is only one star you know, I'm pretty sure it is the sun. This video examines the sun in depth. The video covers the sun's temperature and size, it's layers, the corona of the sun, nuclear fusion energy in the sun, sunspots and solar flares, the sun's position in the universe, and the fate of the sun. Located at the center of our solar system, the sun is the most nearby star to us on E...
Stellar Spectroscopy | Astrophysics History | Women in Astrophysics
มุมมอง 4974 ปีที่แล้ว
Stars. These objects are the wonders of the universe. We have always know quite a bit about them (where they're located, their names, etc). But beginning in the late 1890s, we learned a lot more about these wonders of the universe. In this time period, Harvard Observatory began a the Henry Draper Memorial Project. This project saw Harvard astronomers take pictures of many stars' spectrums, whic...
Exoplanets: Properties and Discovery | Artificial Intelligence in Astrophysics
มุมมอง 7354 ปีที่แล้ว
Exoplanets are awesome. By definition, they are any planetary body that is located outside of our solar system (so a planet that is not Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, or Neptune). Exoplanets have the basic, familiar properties of planets: they orbit stars and rotate on their axis. However, the diversity of exoplanets results in a wide variety of characteristics. Some exop...
Stars and Stellar Evolution | The Strange and Amazing Objects of Our Universe
มุมมอง 2824 ปีที่แล้ว
Stars are amazing. These strange and amazing objects are one of the biggest research areas of astronomy and astrophysics. These incredibly bright objects live incredibly far away from us, where they undergo amazing chemical and physical processes. Astronomers can measure the distance to stars using units of distance called light years (the distance light travels in one year). Most stars are loc...
What you should know about astrophysics careers | Careers | Ordinary Involvement
มุมมอง 87K4 ปีที่แล้ว
This video discusses astrophysics careers and getting involved in astrophysics as an ordinary person. Careers in astrophysics and/or space research are incredibly satisfying. Generally speaking, degrees in astronomy/physics/astrophysics and a PhD in one of those fields are needed. Most astrophysicists work as professors, but some work as full time researchers at observatories. I make the point ...
Chandrasekhar Limit | Subrahmanyan Chandrasekhar | Great Indian Astrophysicist
มุมมอง 1.8K4 ปีที่แล้ว
This is another SimplifiedAstrophysics Astronomer Profiles. I did one on Karl Schwarzschild too, you can check that out here: th-cam.com/video/eFy0_Xc6ryk/w-d-xo.html. This video profile covers Dr. Subrahmanyan Chandrasekhar, a great Indian-American Astrophysicist. Chandrasekhar discovered the "Chandrasekhar Limit," which is the maximum mass for a stable white dwarf to turn into a neutron star ...
Black Hole Schwarzschild Radius & Karl Schwarzschild History
มุมมอง 1.5K4 ปีที่แล้ว
The Black Hole is probably one of the most fascinating things in our universe. Black holes have an interesting property: it's called an event horizon. This is the place where there is no return and you are guaranteed to be sucked in by the black hole. It's like a "tipping point" of the black hole. The distance to the event horizon is called the Schwarzschild radius. What's so special, you ask? ...
The SIMPLIFIED explanation of the 2019 Nobel Prize in Physics | Astrophysics
มุมมอง 3604 ปีที่แล้ว
The SIMPLIFIED explanation of the 2019 Nobel Prize in Physics | Astrophysics
5 Astrophysics Terms to Know | An Introduction to Astrophysics
มุมมอง 2.4K4 ปีที่แล้ว
5 Astrophysics Terms to Know | An Introduction to Astrophysics
Doppler Effect: Motion on Waves | Sound | Light: Redshift & Blueshift
มุมมอง 8714 ปีที่แล้ว
Doppler Effect: Motion on Waves | Sound | Light: Redshift & Blueshift
How to build a simple radio telescope | Understand the far off universe under $15!
มุมมอง 70K5 ปีที่แล้ว
How to build a simple radio telescope | Understand the far off universe under $15!
How radio astronomy shows us the universe: the SIMPLIFIED explanation
มุมมอง 1.1K5 ปีที่แล้ว
How radio astronomy shows us the universe: the SIMPLIFIED explanation
The Mystery of the Arrow of Time & Cosmology
มุมมอง 2045 ปีที่แล้ว
The Mystery of the Arrow of Time & Cosmology
Bigger than you Thought: Hubble’s Law and its Discovery.
มุมมอง 2175 ปีที่แล้ว
Bigger than you Thought: Hubble’s Law and its Discovery.
Are we alone? Astrobiology, Extraterrestrial Life in the Universe, and the Drake Equation.
มุมมอง 2925 ปีที่แล้ว
Are we alone? Astrobiology, Extraterrestrial Life in the Universe, and the Drake Equation.
Kepler's Laws of Planetary Motion
มุมมอง 4455 ปีที่แล้ว
Kepler's Laws of Planetary Motion
Speed up Slow Down. The Orbit of Planets around the Sun using the Conservation of Angular Momentum.
มุมมอง 3615 ปีที่แล้ว
Speed up Slow Down. The Orbit of Planets around the Sun using the Conservation of Angular Momentum.
Why do you weigh different on other planets? The force of gravity and weight loss with physics.
มุมมอง 5195 ปีที่แล้ว
Why do you weigh different on other planets? The force of gravity and weight loss with physics.

ความคิดเห็น

  • @gad3386
    @gad3386 4 วันที่ผ่านมา

    This makes so much more sense than my teacher's explanation. Thank you!

  • @gabyvenegas9350
    @gabyvenegas9350 6 วันที่ผ่านมา

    ur goated ily thank you

  • @pdhowler
    @pdhowler 10 วันที่ผ่านมา

    "... decided to do some math" - I love it. Math. One of the universal languages

  • @ajinkyapradeepdukare8371
    @ajinkyapradeepdukare8371 14 วันที่ผ่านมา

    Bro but can we see monn or any other planets through it if so olz make a vedio

  • @user-pf1sm5rh8c
    @user-pf1sm5rh8c หลายเดือนก่อน

    best and simple explanation ever

  • @mr.curiouswithscience
    @mr.curiouswithscience 2 หลายเดือนก่อน

    👍🏻

  • @elwiwi2346
    @elwiwi2346 3 หลายเดือนก่อน

    Do I have to teach to become one?

  • @cayden02468
    @cayden02468 3 หลายเดือนก่อน

    Thank you so much, this just saved me in my calc 3 class 🙏. I like the palm method

  • @Mel1211
    @Mel1211 4 หลายเดือนก่อน

    Thank uou so much for your videos! They're so interesting, funny and very well explained ! I'm not a physic student but you explained so well that I can understand Thank uou for your work :)

  • @user-zq7xz5fu6w
    @user-zq7xz5fu6w 5 หลายเดือนก่อน

    Careers in space >>>> my dream

  • @SP6QKX
    @SP6QKX 5 หลายเดือนก่อน

  • @meoahanmeow7912
    @meoahanmeow7912 6 หลายเดือนก่อน

    This video help me a lot!!! Thank bro🥹

  • @explorwthcreativity
    @explorwthcreativity 7 หลายเดือนก่อน

    Nicely explained. You brought more clarity to the concept. Looking for more.

  • @dr.rakeshkumarmishra8939
    @dr.rakeshkumarmishra8939 7 หลายเดือนก่อน

    Nice updates about human evolution

  • @bismuthdistrict
    @bismuthdistrict 8 หลายเดือนก่อน

    im scrambling to get a head start in astronomy before im even of legal working age so i can be of significance to the field one day i feel like im doing so many things wrong already

  • @qzorn4440
    @qzorn4440 10 หลายเดือนก่อน

    Very helpful for XYZ Pitch, Yaw, Roll. 😎 Thank you.

  • @luckycharm4494
    @luckycharm4494 10 หลายเดือนก่อน

    Very cool!

  • @rajendragaming4943
    @rajendragaming4943 10 หลายเดือนก่อน

    What is the use of radio telescope

  • @ApteraEV2024
    @ApteraEV2024 11 หลายเดือนก่อน

    5:00 GOAT OF 🐐 GOATS😂 💪 SwartzShield🎉❤

    • @ApteraEV2024
      @ApteraEV2024 11 หลายเดือนก่อน

      Funny , He doesn't look Jewish...in the German Army, Genius...❤

  • @varshavnair2060
    @varshavnair2060 11 หลายเดือนก่อน

    Sir can i pursue astrophysics after bsc maths pls make a video

  • @mominagondalmomina1486
    @mominagondalmomina1486 11 หลายเดือนก่อน

    I'm thinking to enroll for Master in "Astrophysics and space science" Please. Suggest me should i go with it after BS physics.?

  • @hvn110
    @hvn110 ปีที่แล้ว

    I POVEEEE YOU BRO

  • @orbitalweapon7538
    @orbitalweapon7538 ปีที่แล้ว

    Wow made us fool nicely by making satellite detector instead of radio telescope.

  • @ScreamerpipeL337
    @ScreamerpipeL337 ปีที่แล้ว

    Thanks for the insight. I've derailed myself from finding purpose in life for over 10 years. This was a huge memory jog of what it means to have a purpose you want to die for. Not just what is for you. A dead end job that doesn't propel us into the future. If not then I might as well be a mechanic or carpenter. This ... This reminded me of why I studied math to begin with. Thanks for reminding me of my passion.

    • @Mel1211
      @Mel1211 4 หลายเดือนก่อน

      Are you still ?

  • @ibrarkhan9878
    @ibrarkhan9878 ปีที่แล้ว

    Thanks my dear friend. Love from Pakistan. I loved stargazing since my childhood. Now I am studying books written by scientists like Neil Tyson, Mitchio Kaku, Brian Greene, Stephen Hawking and many others. Here in Pakistan, there is no such university where people study Astrophysics. My dream is to go abroad for my study. How can I do that? Please, guide me. I mean which degree I should get so that I can study Astrophysics abroad.

  • @sayanjitb
    @sayanjitb ปีที่แล้ว

    By period of the star you mean its life-time period?

  • @AllaboutSamsungM01core
    @AllaboutSamsungM01core ปีที่แล้ว

    Are you an astrophysicist

  • @MNJ-rc7co
    @MNJ-rc7co ปีที่แล้ว

    That was really helpful. Good Luck with your career✌🏼

  • @PrinceKumar-hh6yn
    @PrinceKumar-hh6yn ปีที่แล้ว

    Our JEE ADVANCED topper has Choosen the same

  • @fatmakhatun5488
    @fatmakhatun5488 ปีที่แล้ว

    How many branches of space science. Can u tell about it and it's basic knowledge

  • @MasterTSayge
    @MasterTSayge ปีที่แล้ว

    I wanted to be an astronomy major years ago. I got out because of extremely low career opportunities for me once I graduated because they are trying to fill that occupation with women. My advice is unless you are a female, avoid astrophysics, physics, and astronomy. It's a huge political agenda!

  • @aloneboi3517
    @aloneboi3517 ปีที่แล้ว

    Where are you frm broo

  • @yaelmorales23
    @yaelmorales23 ปีที่แล้ว

    Astrophysics is not just to satisfy curiosity. Many projects involve a tremendous technological advance. We have the first image of a black hole, the detection of gravitational waves or the James Webb telescope. All these projects involve a collaboration of many scientific areas and a large investment. But every technological development has an application for which it is worth investing. Don't get frustrated by it, practically all science in all countries is like this. It does not only happen in astrophysics, it happens even in lines of research with the greatest immediate technological application.

  • @reign2414
    @reign2414 ปีที่แล้ว

    Can I join any space org like nasa , spacex , isro etc after doing aerospace engg or astrophysics? Or both

  • @A_n_a_t_t
    @A_n_a_t_t ปีที่แล้ว

    Can i join astrophysics after diploma?

    • @A_n_a_t_t
      @A_n_a_t_t ปีที่แล้ว

      ?

    • @akashh2311
      @akashh2311 ปีที่แล้ว

      Diploma in what

    • @A_n_a_t_t
      @A_n_a_t_t ปีที่แล้ว

      @@akashh2311 electronics engineering

    • @A_n_a_t_t
      @A_n_a_t_t ปีที่แล้ว

      @@akashh2311 After diploma can i directly take Msc astrophysics?

    • @Mr.Physics-ql5sy
      @Mr.Physics-ql5sy ปีที่แล้ว

      ​​@@A_n_a_t_tget a Physics degree first. In BSc Physics course keep Astrophysics as your DSE paper and then get enrolled in a good University/Institute for MSc Physics and do Research Project in Astrophysics in your last semester of MSc. Then, you can get into PhD for Astrophysics

  • @kateab_bla_kaleam
    @kateab_bla_kaleam ปีที่แล้ว

    Use the computer to facilitate the explanation

  • @qzorn4440
    @qzorn4440 ปีที่แล้ว

    very nice how to get started video. 😎 now what to do with it to get cool images of out there stuff. 🧐 thanks.

  • @user-ip3rp8yt3w
    @user-ip3rp8yt3w ปีที่แล้ว

    Hi, I find your channel very useful, could you please suggest me some documentaries about astrophysics? Thanks

  • @allenbird7783
    @allenbird7783 ปีที่แล้ว

    It is pretty amazing that there is an entire industry dedicated to making up stories about lights in the sky while producing no tangible benefit to anyone. I guess it keeps them off the streets, makes them feel worthy and so on.

  • @christiancovaciu9855
    @christiancovaciu9855 ปีที่แล้ว

    I’m currently a high school student wishing to be an astrophysicist but I’ve done some research and I’m still not sure what sciences other than physics I need can someone please tell me if I need all sciences or just 2

    • @Mr.Physics-ql5sy
      @Mr.Physics-ql5sy ปีที่แล้ว

      Get a Physics or Maths degree first. Prepare for CUET UG.

    • @sana_jk1727
      @sana_jk1727 หลายเดือนก่อน

      ​@@Mr.Physics-ql5syWe don't get astronomy courses after 12th? like I mean after 12th I want to study astronomy for 5 years and then get a job in that background

  • @nazneen8579
    @nazneen8579 ปีที่แล้ว

    This has been extremely helpful and inspirational! Thank you 🙏🏾

  • @kirantayung2312
    @kirantayung2312 ปีที่แล้ว

    I was like wtf he's showing his juggling talent here 😂

  • @jerin_pearl
    @jerin_pearl ปีที่แล้ว

    Would like to ask ur help to recommend me books on astrophysics and astronomy

  • @jerin_pearl
    @jerin_pearl ปีที่แล้ว

    This video blew my mind away 😍

  • @kokoaung2914
    @kokoaung2914 ปีที่แล้ว

    Hello. Thank you for sharing knowledge. I wanna start something. You know any volunteer or community or internship best to start my dream as astrophysics?

  • @kickdark1004
    @kickdark1004 ปีที่แล้ว

    Does a astronomer want to learn all the branches of astronomy pls reply 😢😢

  • @Miles07i
    @Miles07i ปีที่แล้ว

    I completed my bachelor degree in physics and im planning to do MSc astrophysics!

    • @akashh2311
      @akashh2311 ปีที่แล้ว

      Where are you at rn?

  • @kyawzayarwin8027
    @kyawzayarwin8027 2 ปีที่แล้ว

    Bro isn’t sun real color white? So why did u say sun is yellow dwarf star instead of white dwarf star? Am I having wrong conception?

  • @Kalpanapardhi1
    @Kalpanapardhi1 2 ปีที่แล้ว

    🤓

  • @pri5469
    @pri5469 2 ปีที่แล้ว

    Why parabolic antenna is preferred over elliptical antenna?? For astronomy

    • @mrdelder1007
      @mrdelder1007 5 หลายเดือนก่อน

      Parabolic reflectors preserve phase, so don't have any significant destructive interference. They also focus to a single point. Elliptical reflectors cause aberrations in the image and deal with much more destructive interference, but they are typically far cheaper to manufacture