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Issues
December 1989
ISSN 0002-9505
EISSN 1943-2909
Letters To The Editor
Editorial
Papers
A correction for spring mass in the ubiquitous centripetal force experiment of freshman physics
Am. J. Phys. 57, 1098–1102 (1989)
https://doi.org/10.1119/1.15796
Notes and Discussions
Identification of elements by x‐ray interaction—A laboratory experiment
Am. J. Phys. 57, 1148–1149 (1989)
https://doi.org/10.1119/1.16119
Apparatus Notes
Book Reviews
All objects and some questions
Charles H. Lineweaver, Vihan M. Patel
On the analogy between spinning disks coming to rest and merging black holes
Domenico Davide Meringolo, Francesco Conidi, et al.
Ergodic Lagrangian dynamics in a superhero universe
I. L. Tregillis, George R. R. Martin
Quantum solutions for the delta ring and delta shell
Luis F. Castillo-Sánchez, Julio C. Gutiérrez-Vega
Detecting gravitational waves with light
Markus Pössel
Online “Advanced Labs” in physics
Peter A. Bennett