Posted on 8th May 2008 by Judy Breck in math | physics
formulas, gravitation, gravitational, johannes, kepler, laws, motion, newton, physics, planetary, yale
Kepler’s Laws, Newton’s formulas: grasping grand concepts from great teachers is the online luxury of this learn node. Rice University’s Galileo Project provides the Johannes Kepler biography. NASA spins in an overview for science teachers of Kepler’s Three Laws of Planetary Motion. The image with this post is from a Syracuse University Physics applet that animates Kepler’s Laws.
A class video lecture is provided of Ramamurti Shankar, the John Randolph Huffman Professor of Physics and Professor of Applied Physics at Yale. From from a course in the Fundamentals of Physics, the lecture on Kepler’s Laws covers these ideas: “The focus of the lecture is problems of gravitational interaction. The three laws of Kepler are stated and explained. Planetary motion is discussed in general, and how this motion applies to the planets moving around the Sun in particular.”
Posted on 25th January 2008 by Judy Breck in physics | sciences
Chandra, cycle, MIT, neutron, physics, pulser, reactor, star, vela, x-ray
In a learn node here featuring the MIT Open Courseware on Neutron Science and Reactor Physics this chart of the Neutron Life Cycle is found in Lecture 7. The introduction to the lecture explains that:
A major objective of this course is to determine the neutron flux as a function of both position within a reactor core and the neutron energy. Neutron life cycle analysis is the first method that we will examine for this purpose. It was the principal means of design for nuclear reactors in the 1950s, before the advent of significant computational power. It remains an important tool for qualitative understanding and, in some cases, for quantitative analysis of criticality.
Cosmic perspective on neutrons, is found at the Chandra X-Ray Observatory webpages on Neutron Stars/X-ray Binaries. The image is the Vela Pulser.
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