The Mass Difference Between Protons and Neutrons and the Fine Tuning of Physical Constants

The Mass Difference Between Protons and Neutrons and the Fine Tuning of Physical Constants

To our current knowledge, the strong nuclear force is described at a fundamental level by quantum chromodynamics (QCD)1 , a quantum field theory of quarks and gluons that is strongly coupled at low energies2, 3. The strong coupling, which gives the theory its very rich dynamical content is at the same time responsible for the failure of conventional pert ...

Electroweak Model and Constraints on New Physics

Electroweak Model and Constraints on New Physics

The standard model of the electroweak interactions (SM) [1] is based on the gauge group SU(2) × U(1), with gauge bosons Wi µ, i = 1, 2, 3, and Bµ for the SU(2) and U(1) factors, respectively, and the corresponding gauge coupling constants g and g ′ . The left-handed fermion fields of the i th fermion family transform as doublets Ψi = µ νi ℓ − i ¶ and µ u ...

Shapes of the Proton

Shapes of the Proton

Recent data [1,2] showing that the ratio of the proton’s electric and magnetic form factor GE/GM, falls with increasing momentum transfer Q2 for 1< Q2 < 6 GeV2 have created considerable attention. This behavior or the equivalent statement that the ratio of Pauli to Dirac form factors, QF2(Q2)/F1(Q2) is a approximately constant, indicates that quarks in t ...

Introduction to the Physics of Higgs Bosons

Introduction to the Physics of Higgs Bosons

A basic introduction to the physics of the Standard Model Higgs boson is given. We discuss Higgs boson production in e+e− and hadronic collisions and survey search techniques at future accelerators. The Higgs bosons of the minimal SUSY model are briefly considered. Indirect limits from triviality arguments, vacuum stability and precision measurements at ...

Time, Motion, Force, and the Semantics of Natural Languages

Time, Motion, Force, and the Semantics of Natural Languages

The concepts of ‘time’, ‘motion’, and ‘force’ (‘energy’) refer to everyday experiences in locomotion, event perception, and action. It is obvious that this experience is also a topic in communication, be it phonic, gestural, or written. Time, motion, and force are at the same time basic categories in the physics of inanimate entities, i.e., stones or sta ...

Rubber Broom Instructions

Rubber Broom Instructions

Assembly: Push or screw the broom head onto the handle. Make sure the threads are dry and that the head is on all the way to ensure that the proper vacuum seal is made. Disassembly: Should you ever need to disassemble the Rubber Broom, hold the broom vertical, with the head at the top. Rest the handle on the floor and hold it with one hand. With the othe ...

The Best Social Robots, Humanoid Robots and Industrial Robots in the World Right Now

The Best Social Robots, Humanoid Robots and Industrial Robots in the World Right Now

Home > Blog > Best Robots in the World The twenty-first century will go down in history as an age of innovation and technological advancement, from beginner robot kits to robot-assisted therapy the industry is ever advancing. However, this continual and rapid development makes it increasingly difficult to be able to pin point exactly which robot can be c ...

What Is the Average Solar Panel Size and Weight?

What Is the Average Solar Panel Size and Weight?

Solar energy systems are an increasingly common sight on rooftops all across the U.S., but unless you climb up onto a roof, it can be difficult to figure out how big solar panels are and how much they weigh. This article will help you understand solar panel size, solar panel weight, and whether your roof can support solar panels. How big are solar panels?

6 Ways to Help Your Child Grow a Love for Robotics

6 Ways to Help Your Child Grow a Love for Robotics

6 Ways to Help Your Child Grow a Love for Robotics Robotics and technology are two of the fastest growing industries in the world. These amazing research fields represent tools for solving some of the world's biggest problems whether finding ways to performing delicate surgery or creating new state-of-the-art security tools. However, robotics isn't alway ...

EV’S 4.5″ High Capacity Coil Springs

EV’S 4.5″ High Capacity Coil Springs

AEV’s 4.5″ High Capacity Coil Springs are a direct fit upgrade for customers with an AEV 4.5″ DualSport SC/RS Suspension System. Designed with the overlander in mind, these frequency-tuned, progressive rate coil springs provide the increased load carrying capacity necessary for heavily loaded vehicles, while still offering exceptional ride quality, handl ...

Engineering Physics Major Map

Engineering Physics Major Map

Get to know Engineering Physics. This program allows students to apply the knowledge of fundamental physical principles underlying modern technology and processes. You will study a strategic combination of math, physics and engineering courses from a chosen specialty area. Courses in quantum mechanics, laser optics and nanotechnology will help prepare yo ...

Physic Interactions Unit 3 Chapter 1 Sample Quiz KEY

Physic Interactions Unit 3 Chapter 1 Sample Quiz KEY

1. A wagon is being pulled in a straight line. The forces exerted on the wagon are balanced. The wagon a. speeds up. b. slows down. c. moves with a constant speed. When the forces exerted on an object are balanced, the object does not change its motion. To answer this question you need to understand how balanced forces affect motion. 2. A wagon is being ...

Waveguides and Resonators

Waveguides and Resonators

Waveguides are structures that direct electromagnetic energy along a desired path, transmission lines being just one example. We know that transmission lines consist of two conductors, but some may have more than two, as in three-phase power lines. Maxwell's equations predict that electromagnetic waves can also be guided through hollow metallic tubes, li ...

The Two Most Basic Substances in the Entire Universe Are Matter and Energy

The Two Most Basic Substances in the Entire Universe Are Matter and Energy

Physical Science is a very large branch of science that deals with the study of matter and energy. It includes both Physics and Chemistry. Physics is the study of how objects in the universe move and how they use energy to interact with each other. Chemistry.

Secondary Magnetic Island Observed at the Magnetopause Diffusion Region

Secondary Magnetic Island Observed at the Magnetopause Diffusion Region

Secondary Magnetic Island Observed at the Magnetopause Diffusion Region. Wai-Leong Teh, Stefan Eriksson, Bengt Sonnerup, and Robert Ergun. Magnetic reconnection is a crucial mechanism for converting magnetic field energy into plasma kinetic and thermal.

Lab. 22 Refraction, Polarization and Interference of Light

Lab. 22 Refraction, Polarization and Interference of Light

Lab. 22 Refraction, Polarization and Interference of Light. Edited by Ming-Fong Tai, Date: 2007/10/03. Laser Safety Rule: Please refer to the both word file, Laser Safety-short summary and Laser Safety-complete summary . You must read both files before.