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Ruiz, Michael J.; Perkins, James – Physics Education, 2020
The private company SpaceX regularly launches satellites into geostationary orbits. SpaceX posts videos of these flights with telemetry data displaying the time from launch, altitude, and rocket speed in real time. In this paper this telemetry information is used to determine the velocity boost of the rocket as it leaves its circular parking orbit…
Descriptors: Science Instruction, Video Technology, Satellites (Aerospace), Measurement
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Ruiz, Michael J. – Physics Education, 2019
A video is taken of a road-sign mirage from the passenger seat in a car traveling at constant speed on a highway. The video spans the duration of seeing the mirage of the sign, viewing the vanishing of the mirage as the car approaches, and passing the road sign. The mirage angle, defined as the angle with respect to the horizontal at the moment…
Descriptors: Optics, Geometric Concepts, Motion, Climate
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Hawes, Chloe E.; Ruiz, Michael J. – Physics Education, 2018
Costume jewelry beads are employed to demonstrate how a beam of beads are able to transform into a simple pendulum (single bead) where the pendulum length remains constant throughout. These beads are common and inexpensive for instructors, as well as attractive and exciting for students. Beads are removed from the top, keeping the same pendulum…
Descriptors: Physics, Science Instruction, Teaching Methods, Motion
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Ruiz, Michael J. – Physics Teacher, 2008
An introductory approach to black holes is presented along with astronomical observational data pertaining to the presence of a supermassive black hole at the center of our galaxy. Concepts of conservation of energy and Kepler's third law are employed so students can apply formulas from their physics class to determine the mass of the black hole…
Descriptors: Astronomy, Energy Conservation, Science Instruction, Scientific Principles