| Orthogonality relation for covariant harmonic-oscillator wave functions MJ Ruiz Physical Review D 10 (12), 4306, 1974 | 47 | 1974 |
| Boomwhackers and end-pipe corrections MJ Ruiz The Physics Teacher 52 (2), 73-75, 2014 | 36 | 2014 |
| Covariant harmonic oscillators and the axial-vector coupling constant MJ Ruiz Physical Review D 12 (9), 2922, 1975 | 31 | 1975 |
| Kinematic measurements from YouTube videos MJ Ruiz The Physics Teacher 47 (4), 200-203, 2009 | 19 | 2009 |
| Lenz's law magic trick MJ Ruiz The Physics Teacher 44 (2), 96-98, 2006 | 16 | 2006 |
| Prescribing eyeglasses for myopia and hyperopia MJ Ruiz The Physics Teacher 43 (2), 88-89, 2005 | 12 | 2005 |
| Kepler's third law without a calculator MJ Ruiz The Physics Teacher 42 (9), 530-533, 2004 | 11 | 2004 |
| Flute physics from a flutist’s perspective E Boysen, MJ Ruiz Physics Education 52 (4), 045004, 2017 | 8 | 2017 |
| Making a room-sized camera obscura H Flynt, MJ Ruiz Physics Education 50 (1), 19, 2014 | 7 | 2014 |
| Color Addition and Subtraction Apps F Ruiz, MJ Ruiz The Physics Teacher 53 (7), 423-427, 2015 | 6 | 2015 |
| A Black Hole in Our Galactic Center MJ Ruiz The Physics Teacher 46 (1), 10-12, 2008 | 6 | 2008 |
| Book Review: Seeing the Light: Optics in Nature, Photography, Color Vision and Holography by Falk, David S; Brill, Dieter R; Stork, David G MJ Ruiz The Physics Teacher 26 (4), 252-252, 1988 | 6 | 1988 |
| Lenz’s law with aluminum foil and a lengthwise slit R Berls, MJ Ruiz Physics Education 53 (4), 045001, 2018 | 5 | 2018 |
| Tuvan throat singing and harmonics MJ Ruiz, D Wilken Physics Education 53 (3), 035011, 2018 | 5 | 2018 |
| Students dance longitudinal standing waves MJ Ruiz Physics Education 52 (3), 033006, 2017 | 5 | 2017 |
| Fun with singing wine glasses C Boone, M Galloway, MJ Ruiz Physics Education 53 (3), 035025, 2018 | 4 | 2018 |
| Hearing the transformation of conical to closed-pipe resonances MJ Ruiz Physics Education 52 (3), 035012, 2017 | 4 | 2017 |
| The “2001” theme on the whistling tube MJ Ruiz The Physics Teacher 54 (5), 310-311, 2016 | 4 | 2016 |
| Illusions with plane mirrors MJ Ruiz, TL Robinson The Physics Teacher, 206-212, 1987 | 4 | 1987 |
| Vacuum cleaner isolates over 12 harmonics in the corrugated whistling tube MJ Ruiz, R Berls Physics Education 55 (3), 035012, 2020 | 3 | 2020 |
