General Physics

General Physics I. Molecular Beams

1. Introduction Since the first measurements of the velocity distribution of atoms evaporating from the surface of bulk liquid helium by Johnston and King, several theories have been advanced to explain the helium evaporation process. In these theories, the excita-tions in liquid He II, phonons and rotons, play an important role in the evaporation mechanism. In this report, we discuss an experi...

General Physics I. Molecular Collisions

Quantum physics on a general Hilbert space

Homework in a General Physics Course

The main aim of this study was to determine students' perceptions toward web-based versus paper-based homework and identify any differences based on homework performance score and grade point average. A 21-item perception of online vs. paperbased homework survey was administered to 103 students (54 were male and 49 were female) in general physics-1 classes. Results of the study indicated that t...

Comments: 4 pages Subj-class: General Physics

A particular problem about special kind of two light pulses propagation has been considered in cases of inertial motion, constant homogeneous gravi-tation field and progressive non-inertial motion with constant acceleration. A contradiction between the causality principle and relativity theory has been revealed. 1. Introduction It is well-known that two Einstein's postulates form a basis of spe...