The Water Torture Lab illustrates the use of graphical analysis to derive an equation from a set of data for three variables by using graphs. The time, diameter, and height data are provided of the time it takes for water to drain from a container. Students must make graphs, using Excel, another graphing program, or by hand to derive the relationships between t & d and t & h. These two relationships are them combined by multiplying the x variables. A final graph of t versus the combination using all data confirms that the relationship between the three variables is correct. There are a number of questions in the lab that examine the use of interpolation and extrapolation and why one would generate an equation instead of using the graphs.
The following documents are provided:
• A graphical overview of the entire lab process (PowerPoint & PDF)
• A lab to hand out to students (Word & PDF)
• A lab answer key (Word & PDF)
• A set of solution graphs in Excel format
• This document (Word & PDF)
All of these materials are included in one Zipped file.
Product Type: Lab Handout
Curriculum: Physics (honors level or above)
Level: Grades 9 -12 & college
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Graphical analysis, graphing, interpolation, extrapolation