This particular pilot FlexBook aims at several outcomes: Supplementing currently used Virginia physics textbooks by making valuable contemporary and emerging physics ideas available to all teachers at a single URL; Making laboratory activities that employ industry state-of-the-practice equipment available to all teachers; Providing a path for continuous improvement from teachers themselves through comments and new ideas after using a chapter with their physics classes

The longest geological cycle identified is described as about 600 million years in "Megacycles", the proceedings of a geological conference, Edited by G Williams. However Prof. S. Afanasiev of Moscow has determined the cycle very accurately to be 586.24 million years using his Nanocycles Method. It so happens that cosmologists, Broadhurst, T.J., Ellis, R.S., Koo, D.C. & Szalay (Nature 343, p 726) have observed regular mega-walls of galaxies at spacings that they describe as 128 Mpc/h, which based on the latest Hubble constant values would correspond to 588 million light years. Some cosmologists have suggested that the regularity might result from standing waves. Standing waves in space of wavelength 586 million light years would oscillate in 586 million years. In addition, if there are present harmonics of these waves as both the geological cycles and the additional peaks in the galaxy survey indicate, then powerfully energetic events would recur on Earth at these intervals. This agreement on the wave sizes actually allows a much more accurate Hubble constant to be determined from Afanasiev's accurate cycle period.

What are “dimensions”? An introduction to the 5th dimension.

Introduces the object that contains almost all of the mass in the universe, the atomic nucleus. Antimatter, beta rays, fission and fusion, the structure of the atomic nucleus, how elements on the earth were produced, how we use the nucleus in every day life, and the effects of radiation in the environment are among the topics. The site includes nearly a dozen experiments that can be done in chemistry and physics classes, along with A Teacher's Guide to the Nuclear Science and Technology Wall Chart.

This educational brief explains the idea that nuclear fusion is thought to be the mechanism by which virtually all of the elements around us are created. Topics include the proton-proton cycle, the carbon-nitrogen-oxygen cycle, and endothermic reactions in supernova explosions. There is also a discussion of the Advanced Composition Explorer (ACE), a spacecraft intended to study the origin and evolution of the elements produced by our Sun.

Worksheet on circuits that looks at the AND logic gate. Students are required to mark the current flow to show the possible combinations of high and low inputs and high or low output. They must draw up a truth table and relate each line of the truth table to a complete circuit. A set of circuits with current flow marked is also given as a 'solution'.

Relevant material from MIT's introductory courses to support students as they study and educators as they teach the AP Physics curriculum.

Early in 2008, an Ariane 5 rocket blasted off from Europe’s spaceport in French Guiana. The rocked carried the most sophisticated lorry ever built – the European Space Agency’s Automated Transfer Vehicle, the ATV. From its first flight, ATV will play a vital role in International Space Station (ISS) servicing. Every 12 months or so, the ATV will haul 7.5 tonnes of cargo to the ISS, 400 km above the Earth. The video - addressed mostly to the youngsters- tells the story of a very special delivery and provides information about the ATV, its highly technological features and its importance for the ISS. For further information and exercises please visit our Education ESA website http://www.esa.int/esaHS/education.htmlhttp://www.esa.int/SPECIALS/Space_In_Bytes/index.html

The nature of acceleration is determined by the net external force for constant mass system. Depending on the nature of force, there exists wide range of possibilities like zero, constant or varying accelerations in one dimensional motion.

Solving problems is an essential part of the understanding process.

Motion in two dimensions with one dimensional acceleration (projectile) is analyzed with component motions in coordinate system, whereas motion in two dimensions with two dimensional acceleration (circular motion) is analyzed with the help of component accelerations - tangential and normal accelerations.

Solving problems is an essential part of the understanding process.

The rate of change of velocity with time is called acceleration. Most of the real time examples of motion are accelerated in variety of ways - despite the fact that the basic nature of the matter is to maintain its velocity in both direction and magnitude

Using students' step length to understand the relationship between distance, speed and acceleration. Includes graphing of data and interpretation of graphs.

This website presents MathWorld's definition of accuracy. The site also includes links to related concepts and other math topics.

In physics and mathematics, series expansions to approximate functions are often used because using the exact solution is either impossible or involves unnecessary complicated calculations. This Demonstration shows accuracy for a series of expansions and how adding terms increases that accuracy moving away from the origin.

A car propelled by the reaction between lemon juice and baking soda has more in common with rockets and jet aircraft than one might think. In this video segment adapted from ZOOM, two cast members demonstrate the power of rocket-propelled vehicles and how to exploit the force produced by the carbon dioxide gas. Grades 3-8.

This course will focus for a large part on MOSFET and CMOS, but also on heterojunction BJT, and photonic devices.

This course is about the electronic properties of materials and contains lectures about scattering, transport in metals, phonons and superconductivity.