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Physical Sciences and Mathematics Commons™
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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Increasing The Longevity Of Tungsten Filaments In A Zone Refiner, Byron D. Greenlee
Increasing The Longevity Of Tungsten Filaments In A Zone Refiner, Byron D. Greenlee
Senior Theses
Zone refining is used for its ability to purify material and grow single crystals. To produce these single crystals, a suspended molten zone, generated by electron bombardment, passes along the polycrystalline stock. During a zone refining run, the filaments that produce the electron bombardment can fail. In this project, the longevity of tungsten filaments in a zone refiner was investigated. A new bombardment geometry was constructed to attempt to increase the longevity of the filaments. The new geometry had a shield machined into it to prevent line-of-sight impurities originating in the molten zone from striking the filaments. It was found …
Effects Of Tension On Resonant Frequencies Of Strings, Blake Burnett
Effects Of Tension On Resonant Frequencies Of Strings, Blake Burnett
Senior Theses
This project tests and explores resonance of strings. Since all materials and mechanisms are affected by vibrations, it is important to know the frequencies at which resonance occurs. To explore this subject, strings were used as a model material to test the effect tension has on resonance. The fundamental frequencies and the corresponding modes of resonance were used to analyze the data. The results of this experiment show that increasing tension on a string increases its resonance frequency. Understanding the physics behind resonance frequency allows systems to be designed to take advantage of resonance properties, or to avoid resonance where …
The Effects Of Surface Pace In Baseball, Jason Farlow
The Effects Of Surface Pace In Baseball, Jason Farlow
Senior Theses
A baseball travels across different surfaces at different paces. The goal of this experiment is to find a percentage difference in speeds the ball will reflect off a given surface. The energy lost on the turf surface was far more significant than on dirt surface as the turf lost an average of 26% of its energy as compared to just 16% of the energy on dirt. In the Northwest conference, teams play on four turf-based infields and five dirt-based infields. The results of this study suggest that kinetic friction forces are more significant in reducing ball rebound speed than in …
Measuring The Double Layer Capacitance Of Electrolytes With Varied Concentrations, Geoffrey Rath
Measuring The Double Layer Capacitance Of Electrolytes With Varied Concentrations, Geoffrey Rath
Senior Theses
When electric potentials are applied from an electrolytic fluid to a metal, a double layer capacitor, Cdl, develops at the interface. The layer directly at the interface is called the Stern layer and has a thickness equal to roughly the size of the ions in the fluid. The next layer, the diffuse layer, arises from the gathering of like charges in the Stern layer. This layer is the distance needed for ionic charges to return to equilibrium. This distance, called the Debye length, λ, depends on the square root of the electrolyte concentration. To study the properties of …
The Drag Coefficient Of Varying Dimple Patterns, James M. Seeley, Michael S. Crosser
The Drag Coefficient Of Varying Dimple Patterns, James M. Seeley, Michael S. Crosser
Senior Theses
There are many golf balls on the market today with varying dimple sizes, shapes, and distribution. These proprietary differences are all designed to reduce drag on the balls during flight, allowing golfers to hit the ball farther distances. There are limited published studies comparing how varying the dimples affects the reduction of drag. An experiment was developed in which golf balls were pulled through a water tank to measure the drag force acting on each ball. The water was chosen to allow for testing at slower velocities than the typical necessary speeds to cause turbulence for balls traveling in air. …
Experimentally Investigating Water Aerosol Formation Via Alpha Radiation In A Humid Nitrogen Atmosphere, Megan Payne
Experimentally Investigating Water Aerosol Formation Via Alpha Radiation In A Humid Nitrogen Atmosphere, Megan Payne
Honors Theses
This project aims to verify the formation of water aerosols induced by an ionizing radiation source in a Nitrogen atmosphere with various levels of humidity. This work is part of an effort to characterize the overall signature of ionizing radiation in Earth’s typical atmosphere. By signature, it is meant all the chemical reactions and physical processes that take place between Earth’s atmosphere and the ionizing radiation. This signature can potentially be used to identify a radiation source out in the field. The identification of a radiation source could potentially be used in a variety of defense applications. To characterize this …
Understanding, Designing And Building A Hydroelectric Generator, Nicholas Weare Shenberger
Understanding, Designing And Building A Hydroelectric Generator, Nicholas Weare Shenberger
Senior Projects Spring 2018
When you hear the word hydropower you automatically jump to using water in order to create power or electricity. However, delving deeper and trying to understand the technology involved in it becomes quite a lot more complicated. To try to comprehend some of the knowledge of how to convert the power of water into electricity, I decided to design and build my own hydroelectric generator. I took the time to research and discover more about the process of building a generator and the specific pieces that come together in order to build one specifically powered by water. After my research, …