Introduction to Pressure Sensors
Pressure sensors are one of the most widely used sensors and can be found in probeware for lab measurements, but more commonly in billions of devices including smartphones, wearables, automobiles, drones, weather centers, and medical instruments. Pressure sensors were one of the first sensors to be miniaturized and mass produced at a low cost through microelectromechanical systems (MEMS) fabrication.
Phyphox App Can Connect with PocketLab Voyager for Interesting New Experiments and Use Cases
The public phyphox beta for connecting Bluetooth Low Energy devices to their data logging app was released this month. A collection of ten experiments, designed by PocketLab superuser Dr. Richard Born, connects PocketLab Voyager with the phyphox app for a number of exciting new use cases, including connecting two Voyagers at once and displaying both data sets simultaneously.
Lissajous patterns have fascinated physics students for decades. They are commonly observed on oscilloscopes by applying simple harmonic functions with different frequencies to the vertical and horizontal inputs. Three examples are shown in Figure 1. From left to right, the frequency ratios are 1:2, 2:3, and 3:4. These Lissajous patterns were created by use of the parametric equation section of The Grapher software written by the author of this lesson. You are welcome to use this softwa
Introduction to this Lab
This is a quick and fun lab for makers! In this lab, a pair of PocketLabs and Phyphox software are used to make a tracer. As shown in Figure 1, the pair of PocketLab Voyagers are mounted to a small movable rectangular piece of plastic, perpendicular to one another and parallel to two edges of the plastic. A small black circle is taped to the plastic to serve as the point for following the item to be traced. In our example, a five-pointed star is traced. One of the Voyagers is labeled X, and it
These coils come in pairs with the same number of turns of wire on each of the two coils. In "true Helmholtz" configuration: (1) the coils are wired in series with identical currents in the same direction in each coil, and (2) the coils are placed a distance apart that is equal to the radius of each coil. When in this configuration, they produce a very uniform magnetic field that is directed along their common central axis.
Magnetic Fields from Electric Currents
One of the classes of problems dealing with magnetic fields concerns the production of a magnetic field by a current-carrying conductor or by moving charges. It was Oersted who discovered back in the early 1800's that currents produce magnetic effects. The quantitative relationship between the magnetic field strength and the current was later embodied in Ampere's Law, an extension of which made by Maxwell is one of the four basic equations of electromagnetism.
A Physics Challenge
In this lesson, AP and college students are challenged to derive equations for the periods of two fundamental modes of oscillation of a pair of coupled physics carts. Derivation will involve Hooke's law, Newton's Second Law of Motion, and principles of simple harmonic motion. Theory is then compared to experimental results obtained from PocketLab Voyager rangefinder data using Phyphox software.
In this lesson students will find that a current-carrying loop can be regarded as a dipole, as it generates a magnetic field for points on its axis. Students use PocketLab Voyager and Phyphox software to compare experiment and theory for the magnetic field on the axis of a current loop. A similar experiment not making use of Phyphox can be found by clicking this link. An experiment making use of a magnet, instead of a
Isaac Newton is well-known for the apple that hit his head and the discovery of gravity. His three Laws of Motion, however, are among the most famous laws of physics. In this lesson, we are especially interested in Newton’s Third Law of Motion—all forces between two objects are equal in magnitude and opposite in direction. We will be studying collisions between two identical carts that are bouncing back-and-forth, much like a Newton’s cradle with just two steel balls. Repelling magnets attached to the front bumpers of each of the carts al