Determination for the grade level for grades five through nine of the difficulty of the principle: whenever one body moves over or is rubbed against another body, a resistance to motion takes place, which results in the production of heat

Date
1954
DOI
Authors
Sahlberg, Henning A
Version
OA Version
Citation
Abstract
Description
Thesis (Ed.M.)--Boston University
License
Based on investigation of the BU Libraries' staff, this work is free of known copyright restrictions