Practical Physics This website is for teachers of physics in schools and colleges. It is a collection of experiments that demonstrate a wide range of physical concepts and processes. Some of the experiments can be used as starting-points for investigations or for enhancement activities. Many have links to carefully selected further reading and all include information and guidance for technicians. Physics is a practical science. Practical activities are not just motivational and fun: they can also sharpen students’ powers of observation, stimulate questions, and help develop new understanding and vocabulary. Good quality, appropriate physics experiments and investigations are the key to enhanced learning, and clarification and consolidation of theory. We have published a new set of resources to support the teaching of practical science for Key Stages 3-5.
Succeed in Understanding Physics by Ron Kurtus - School for Champions Physics is a branch of Physical Science that is concerned with the study of the physical properties of matter. The subject can be divided into three main areas: Classical Physics, Relativity, and Quantum Mechanics. The material here will concentrate on classical or everyday physics. The knowledge of Physics is important for the development of the products we use. The purpose of these free online lessons is to give you a start at improving your scientific knowledge of physics that will help you become a champion in the field. New lesson: Archimedes Solves Density Problem Physics Contents Basics of Physics Physics OverviewUsing Mathematics in Physical Science Fundamental Units of Measurement Using a Scientific Calculator Sensors and Detectors Physics of Computer Games Three Levels of a Champion in Science (back to contents) Matter Overview of Study of MatterDefinition of Matter Theories of Matter Kinetic Theory of Matter Measurement of the Mass of Matter Particles of Matter Density Fluids Motion
High School Physics and AP Physics Online Digital Logic - Gates, Boolean Algebra An Introduction to Digital Logic - Signals and Gates What Are You Going To Learn? Logic Signals And Gates ANDORNOT (Inverter)NANDWiring A GateA NAND Simulation An Example Problem Boolean Algebra Problems You are at: Elements - Logic Circuits - GatesReturn to Table of Contents Introduction - Why Do You Want to Learn This Material? In this lesson you're going to be introduced to Digital Logic. Digital logic is the foundation for digital computers. What Are You Going to Learn? There are at least two general areas you need to become familiar with. First, there's background you need to know - the basics of digital logic - things like zeros and ones (0s and 1s) and how you can represent signals as sequences of zeroes and ones. Objectives For This Lesson Here's what we are after in this lesson - what you should be able to do. Given a system that uses logic signals Be able to specify what the output will be when the input is zero (0) and what the output will be when the input is one (1). Logic Signals Let Q1.
Physics and Astronomy Online Portal Boolean Logic, Gates, and Computer Circuits Boolean Logic, Gates, and Building Computer Circuits (revised 02/06/2008) Since computers are built out of bi-stable electronic circuits, the two-value system of Boolean logic is used in circuit design. Boolean logic has two values: true and false. Boolean Logic : There are two Boolean values true and false which are sometimes represented as 1 (true ) and 0 (false). A simple Boolean expression is an expression that evaluates to true or false. example : (a Compound Boolean expressions are formed out of simple Boolean expression using Boolean operations Common Boolean operations are AND, OR , NOT , and XOR (eXclusive OR) In Python use and , or and not, True and False In C++ && denotes AND, || denotes OR and ! Defining AND, OR, NOT and XOR The fourth Boolean function, XOR (exclusive or) is sometimes included with the other three. Evaluating Compound Boolean Expressions Example: A leap year is a year which is divisible by 4 and not a century year (i.e. Boolean Operator Precedence Rules a | b | result
Smile Into Your Organs: “A smile is an inexpensive way to improve your looks” Charles Gordy I love the idea that smiling is used as a healing and meditation practice by many ancient cultures. Taoists believe that holding a smile on your face and directing it inwards towards your organs and inner body, is the key to good health and longevity. Traditional Balinese healers know that a smile washes away bad energy and recommend smiling meditation as a simple way to calm the mind and bring health to the soul. Photo by stuck in customs: How to smile on the inside: I was first introduced to the Taoist exercise called the “inner smile” about 15 years ago. Each week we were guided to smile on our face, really feel the smiling energy and then imagine ( in our minds eye ) sending the smiling energy into each of our organs. Now, this might sound super easy, however some weeks – to my surprise – some organs simply refused to receive a smiling breath. Smile into your organs and dissolve negative emotions: .
10 Strange Things About The Universe Space The universe can be a very strange place. While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ? One of the properties of a negative-energy vacuum is that light actually travels faster in it than it does in a normal vacuum, something that may one day allow people to travel faster than the speed of light in a kind of negative-energy vacuum bubble. One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. Relativity of Simultaneity Since this extra dimension is so small, only tiny objects, such as particles, can move along it. Antimatter Retrocausality
Higher Density Blog In5D.com. By now, pretty much all of us know and accept that meditation provides a plethora of benefits, including reduced tension and stress and improved focus and concentration. However, how and why meditation does this has long remained unknown—until now! Harvard University scientists have published the results of an 8-week study that used magnetic resonance imaging (MRI) to examine the effects of meditation on the brain. MRIs were taken at the beginning and end of the 8-week study. We know what you’re thinking: what is this mysterious gray matter that meditation is rebuilding? Research on the brain has shown that the amount and density of gray matter differs from individual to individual, and can determine or signify certain traits or talents. The Harvard study found that meditation can increase the density of the gray matter in the hippocampus, specifically. -The Alternative Daily Found at:
Optics basics: surface plasmons | Skulls in the Stars My goal in my "basics" series of posts is not just to introduce the most elementary topics in optical science, but also to give background on some of the more advanced concepts for future reference. Much of my own research, and consequently my blog interests, center on nano-optics -- the study of the behavior of light on scales much smaller than the wavelength of light -- and one specific aspect of nano-optics that has grown tremendously in importance over the past ten years is the concept of a surface plasmon. Broadly speaking, a surface plasmon is a traveling wave oscillation of electrons that can be excited in the surface of certain metals with the right material properties. Because a plasmon consists of oscillating electric charges, they also have an electromagnetic field associated with them which also carries energy. A simple schematic of a surface plasmon is shown below¹: It is important to note that not all metals can support surface plasmons. 1) Field enhancement. \(E=pc\). ³ D.