In theoretical physics, particularly in discussions of gravitation theories, Mach's principle (or Mach's conjecture) is the name given by Einstein to an imprecise hypothesis often credited to the physicist and philosopher Ernst Mach. The hypothesis attempted to explain how rotating objects, such as gyroscopes and spinning celestial bodies, maintain a frame of reference. The proposition is that the existence of absolute rotation (the distinction of local inertial frames vs. rotating reference frames) is determined by the large-scale distribution of matter, as exemplified by this anecdote: You are standing in a field looking at the stars. Your arms are resting freely at your side, and you see that the distant stars are not moving. Now start spinning. The stars are whirling around you and your arms are pulled away from your body. Why should your arms be pulled away when the stars are whirling? Why should they be dangling freely when the stars don't move? Mach's principle says that this is not a coincidence—that there is a physical law that relates the motion of the distant stars to the local inertial frame. If you see all the stars whirling around you, Mach suggests that there is some physical law which would make it so you would feel a centrifugal force. There are a number of rival formulations of the principle, often stated in vague ways like "mass out there influences inertia here". A very general statement of Mach's principle is "local physical laws are determined by the large-scale structure of the universe". Mach's concept was a guiding factor in Einstein's development of the general theory of relativity. Einstein realized that the overall distribution of matter would determine the metric tensor which indicates which frame is stationary with respect to rotation. Frame-dragging and conservation of gravitational angular momentum makes this into a true statement in the general theory in certain solutions. But because the principle is so vague, many distinct statements have been made which would qualify as a Mach principle, and some of which are false. The Gödel rotating universe is a solution of the field equations that is designed to disobey Mach's principle in the worst possible way. In this example, the distant stars seem to be revolving faster and faster as one moves further away. This example does not completely settle the question of the physical relevance of the principle because it has closed timelike curves. (Wikipedia).
Calculus 3: Vector Calculus: Motion in a Plane (1 of 15) General Concept
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the general concept of motion in a plane (2-D) in vector calculus in relationship to position vector (r(t)), velocity vector (v(t)), and, later, acceleration vector (a(t)). Next video in the
From playlist CALCULUS 3 CH 3.1 VECTOR CALCULUS: MOTION IN A PLANE
First example of using a symmetry principle show a conserved quantity. I show that the conservation of linear momentum comes from a radial symmetry in forces.
From playlist Physics ONE
C73 Introducing the theorem of Frobenius
The theorem of Frobenius allows us to calculate a solution around a regular singular point.
From playlist Differential Equations
AWESOME Physics demonstration. Pascal' s principle and hydraulic pressure!
Pascal's law or the principle of transmission of fluid-pressure (also Pascal's Principle is a principle in fluid mechanics that states that a pressure change occurring anywhere in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywher
From playlist PRESSURE
A mathematics bonus. In this lecture I remind you of a way to calculate the cross product of two vector using the determinant of a matrix along the first row of unit vectors.
From playlist Physics ONE
Mach's Principle - Sixty Symbols
Mach's Principle and Centripetal vs Centrifugal Force. More links and info below ↓ ↓ ↓ Patreon: https://www.patreon.com/sixtysymbols Some extra clips from this interview: https://youtu.be/Y4_NBjZthyE This video features Professor Mike Merrifield from the University of Nottingham... htt
From playlist Mike Merrifield - Sixty Symbols
#Physics #Mechanics #Engineering #NicholasGKK #Shorts
From playlist General Mechanics
Jet Aircraft Propulsion by Prof. Bhaskar Roy and Prof. A. M. Pradeep, Department of Aerospace Engineering, IIT Bombay. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist IIT Bombay: Aerospace - Jet Aircraft Propulsion (CosmoLearning Aerospace Engineering)
Dynamics : An overview of the cause of mechanics
Dynamics is a subset of mechanics, which is the study of motion. Whereas kinetics studies that motion itself, dynamics is concerned about the CAUSES of motion. In particular, it involves the concepts of force, momentum and energy. This video gives an overview of what dynamics is, and is u
From playlist Dynamics
Mach numbers | Mechanical waves and sound | Physics | Khan Academy
We can measure speeds relative to the speed of sound. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/sound-topic/v/decibel-scale?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.
From playlist Oscillations and mechanical waves | Physics | Khan Academy
RefCell - The Rust Book (part 56) chapter 14
I'm streaming every weekday morning on Twitch at https://www.twitch.tv/brookzerker. Please feel free to stop by and say hi! Links Rust book: https://doc.rust-lang.org/book/second-edition/ My code: https://github.com/BrooksPatton/learning-rust The Learning Wiki: https://github.com/BrooksP
From playlist Rust Book
Science of Flight | Breaking the Sound Barrier and Beyond | The Great Courses
If you want to see what it looks like inside a plane breaking the sound barrier, just look down the street on a hot day. This is because the same principles that cause mirages on summer streets dictates the shockwaves at Mach 1. Call the drink cart; it's going to be a smooth ride. This vi
From playlist Science
Helmholtz Principle and Vortex Motion with @DrTrefor
Oxford Mathematician Dr Tom Crawford teaches @DrTrefor about Helmholtz' Principle and how it can be applied to calculate the motion of a vortex in 2D potential flow. Watch part 2 of the collaboration where @Dr. Trefor Bazett teaches me a little algebraic topology, specifically the funda
From playlist Interviews
60 Sritharan - Stochastic Navier-Stokes equations - solvability & control
PROGRAM NAME :WINTER SCHOOL ON STOCHASTIC ANALYSIS AND CONTROL OF FLUID FLOW DATES Monday 03 Dec, 2012 - Thursday 20 Dec, 2012 VENUE School of Mathematics, Indian Institute of Science Education and Research, Thiruvananthapuram Stochastic analysis and control of fluid flow problems have
From playlist Winter School on Stochastic Analysis and Control of Fluid Flow
Mod-20 Lec-40 Performanace and Design of Ramjet & Scramjet Engines
Jet Aircraft Propulsion by Prof. Bhaskar Roy and Prof. A. M. Pradeep, Department of Aerospace Engineering, IIT Bombay. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist IIT Bombay: Aerospace - Jet Aircraft Propulsion (CosmoLearning Aerospace Engineering)
Elitzur-Vaidman bomb tester. You have a bunch of bombs, but some of them are duds. Can quantum physics help us find the live ones without detonating any of them? Hi! I'm Jade. I draw pictures that move and become animated physics videos. ***SUBSCRIBE*** https://www.youtube.com/c/upand
From playlist Physics
Ken Mogi - How do Human Brains Function? (Part 1)
Free access to Closer to Truth's library of 5,000 videos: http://bit.ly/2UufzC7 What is it about human brains that enable both the regulation of bodily activities and the generation of mental thoughts? What are the mechanisms of human brain function? How do they integrate to give the sens
From playlist Understanding the Brain - Closer To Truth - Core Topics
Physics, Torque (1 of 13) An Explanation
Explains what torque is, the definition, how it is described and the metric units. Also presented are two examples of how to calculate the torque produced by a force. Torque is a turning force. It is a measure of how much force acting on an object that causes the object to rotate. The ob
From playlist Mechanics
An Investigation of the Influence of Gravity on Macroscopic Mechanical by Miles Blencowe
21 November 2016 to 10 December 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Quantum Theory has passed all experimental tests, with impressive accuracy. It applies to light and matter from the smallest scales so far explored, up to the mesoscopic scale. It is also a necessary ingredie
From playlist Fundamental Problems of Quantum Physics