Undergraduate research: Laboratory experiments with many variables Arne Rosén 1, Magnus Karlsteen 2, Jonathan Weidow 2, Andreas Isacsson 2 and Ingvar Albinsson 1 1 Department of Physics, University of Gothenburg 2 Department of Applied Physics, Chalmers University
Tänka, Experimentera, Analysera, Rapportera Själv-laborationer CTH Meddelanden 6-78
Tänka, Experimentera, Analysera, Rapportera Själv-laborationer CTH Meddelanden 6-78
Introduktion till Experimentell problemlösning Mäta Analysera Rapportera Ture Erikson, Arne Rosén Ture Erikson
Outline - Students in Physical eng. visit Brunel Univ, Eng Richards - Physics Dept decide to start a new course in exp physics - Visit of Trondheim Univ., Engineer Haave - 1977 Start a course in Think, Do experiments, Analyze, Report, (Tänka, experimentera, analysera, rapportera, Själv laborationer - General approach -- Identify the physical variable to measure -- Identify other important variables
Outline (continue) Document the recorded data in a log-book Analyze the data, Use ruler and a logaritmic paper in the start up Today use computers to record and analyze data Determine a relation between the diffrerent variables Determine a general relation for the experiment Write a report
The Pegboard A piece of pegboard may be pioveted in any of the several existing holes. Your problem is to detemine, which variables will influence the period of the oscillating pegboard and find the relation between these variables
Experimental setup
Different kind of pegboards
Measurements
Approach for the study
Recorded experimental data
Funktionssamband
Funktionssamband
Funktion Logaritmera Plot log y som funktion av log x, slope = n
Recorded experimental data
Analyze the experimental data log - log plot to determine n. Note two values of n
The vibrating spring The loaded spring will vibrate when it is stretched out. Your problem is to determine which, and how diffrent variables will influence the frequency of the vibrating spring. The springs have the following dimensions Data of the springs
Vibrating spring --- setup
Overview of springs
Roling cylinders Your problem is to investigate the relation between the variables which will influence the time that it takes for cylinder to roll down an inclined plane. The cylinders have the following data
Data for rolling cylinders
Overview of setup
Examples of cylinders
Vibrating beams A beam can be into vibrations with or without load in the free end. Your porblem is to investigate which, and how different variables will influence the period, or the frequency of the vibrating beam. The beams have the following dimensions
Data for the vibrating beams
Overview of setup
Sinking boats Your problem is to determine the variables which will describe how long time it will take for a boat to sink. It is necessary to make systematic collection of data. Some physical thinking is also necessary to get a complete solution of the problem. There are six orificies which allow you to change the size of the leak. The orifices have the following diameters: 2.0, 2.5, 3.0, 4.0, 5.0 and 6.0 mm
Overview of setup
Falling spheres You shall use the following material to investigate how spheres will fall in a liquid. It is first necesaary to determine which forces will act on the sphere and how you can calculate the forces. You have six different tubes with the following oils
Example of the setup
Capillary flow Your problem is to determine which variables will affect the rate flow water through small tubes, and to find a realtion between the different variables
Example of setup
Rapport av utförda experiment Titel Del 1 Sammanfattning, svenska engelska Innehållsföteckning Inledning Del 2 Problemställning, Apparatur Utförandet Resultat Diskussion Slutsatser Referenser Appendix Del 3
Gunno Klingfors Barocken Instrumental Praxis
Retorik, Rapport av utförda experiment Exordium (ur talet) Del 1 Inledning avsedd att väcka intresse om vad som komma skall Narratio (berättelse) Del 2 denna del skall läsaren/åhöraren informeras så att de idéer som skall presenteras blir förstådda Propositio (förslag) I denna del skall de egna idérena presenterasa Confutatio (vederläggelse) Argument som skall tänkas tala emot vederläggs med bravur Confirmatio (bekräftelse) De egna idéerna upprepas och bekräftas Peroratio (för talet) Avslutning som lämnar läsaren/åhöraren vid gott mod och med ett positivt intryck av framställan
Astronomi och idrott
European Flagship Graphene Jari Kinaret