This article comes from a question asked by a student of mine: if the Sun radiates energy in the form of electromagnetic waves, could they shift the Earth from its current orbit on a suitable timescale? The answer to such a question is apparently obvious and trivial. Nevertheless, it requires an instructive reasoning and interesting estimates of…

When asked to explain the Galilean non-invariance of classical electromagnetism on the basis of pre-relativistic considerations alone, students--and sometimes their teachers too--may face an impasse. Indeed, they often argue that a pre-relativistic physicist could most obviously have provided the explanation "at a glance", on the basis of the…

This manual was written to help guide education stakeholders--including parents, students, school board members, community activists, administrators, policymakers and attorneys--in their efforts to promote racial diversity and avoid racial isolation in suburban school systems. Critical information on the current legal, political and policy issues…

The force between two parallel current-carrying wires is investigated in the rest frames of the ions and the electrons. A straightforward Lorentz transformation shows that what appears as a purely magnetostatic force in the ion frame appears as a combined magnetostatic and electrostatic force in the electron frame. The derivation makes use of a…

In an inhomogeneous magnetized plasma the transport of energy and particles perpendicular to the magnetic field is in general mainly caused by quasi two-dimensional turbulent fluid mixing. The physics of turbulence and structure formation is of ubiquitous importance to every magnetically confined laboratory plasma for experimental or industrial…

Since the early 1990s when the nation's first charter school was opened in Minneapolis, the scope and availability of school-based options to parents has steadily expanded. No longer can public education be characterized as a monopoly. Sponsored by the National Center on School Choice (NCSC), this handbook makes readily available the most rigorous…

Introductory calculus-based physics textbooks state that electromagnetic waves are transverse and list many of their properties, but most such textbooks do not bring forth arguments why this is so. Both physical and theoretical arguments are at a level appropriate for students of courses based on such books, and could be readily used by…

This booklet provides parents and students with information about individual schools and programs within the Boston Public School system. The first section answers common questions about enrollment procedures, school assignments, bilingual education programs, kindergarten, transportation eligibility, family changes of address, and parent…