This article shows that the centrifugal force in a rotating reference frame possesses the property that the brachistochrone and tautochrone are identical. In this system the force is repulsive and proportional to the distance from the force center. (Author/BB)

Derives an explicit representation of the permutation operator in terms of coordinate and momentum operators. (Author/GA)

Studies the elastic linear collision of three bodies of equal mass. One of the bodies is incident on the other two which are at rest and in contact with each other. (GA)

Describes a project for students to collect and fit data to a theoretical mathematical model that describes the rate of isothermal seed germination, including activation energy for substrate and produce and the autocatalytic reaction, and changes in enthalpy, entropy, and the Gibb's free energy. (Author/SK)