Skills and Techniques
Title | Summary | Post date | |
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Using spreadsheets |
Keywords: absolute and relative cell references, chi-squared, Excel, formulas, graphing, model, OpenOffice Calc, simulating data, Solver, spreadsheets, trend line, uncertainties Want a quick way to do calculations, simulate data and draw graphs? Here are some quck tips on using spreadsheets to do this! In this activity, we will use an accepted physical model, that of an object falling in a vacuum, to create simulated data that could result from an experiment. We will then graph this data and fit a trend line to it. Read More... |
7 years 20 weeks ago | |
Order of Magnitude Calculations |
Keywords: approximation, calculation, estimation, order of magnitude How can we make reasonable approximations without tedious calculations? Use order of magnitude calculations to make reasonable approximations. Read More... |
7 years 18 weeks ago | |
Dimensional Analysis |
Keywords: checking answers, dimensional analysis, units Unsure if your result makes sense? Learn how to check if results make sense by analyzing the units involved in the calculations. Read More... |
7 years 18 weeks ago | |
Useful Numbers |
Keywords: numbers, units, values Wondering where we got our numbers from? Check out this table! A summary of numbers commonly used throughout the articles and where they came from. (e.g. energy content of fuels, solar power, greenhouse gasses etc.) Read More... |
7 years 18 weeks ago | |
Symbols and Units Used on this Site |
Keywords: symbols, units Wondering what each symbol refers to? A summary of symbols commonly used throughout the articles. Read More... |
7 years 16 weeks ago | |
LaTex Expressions - Symbols and Units |
Keywords: LaTeX, symbols, units Wondering what each symbol refers to? A summary of symbols commonly used throughout the articles and the corresponding LaTeX expressions. Read More... |
7 years 15 weeks ago | |
Scientific Notation |
Keywords: scientific notation The suspect is a male, age 1.73 × 10^{9} s, height 1.83 m, weight 7.5 × 10^{1} kg. Understanding how to express numbers in a way that is easily understood. Read More... |
7 years 15 weeks ago | |
Significant Figures |
Keywords: calculators, mathematics, physics, significant figures, what numbers mean This tyrannosaurus is 70,000,003 years old. How many significant figures should I quote? We examine this perennial student hang-up. Read More... |
7 years 15 weeks ago | |
Histograms, Measurement, and Uncertainty |
4 years 2 weeks ago | ||
Trend Analysis in the Context of Global Warming |
Keywords: anthropogenic climate change, climate, climate change, trend analysis There are many sources ranging from politicians to mass media that claim that the Earth is actually cooling, not warming as scientists say it is. Unusually cold periods and local changes in weather are generally the cause for these statements. Why are these claims inaccurate? There are many claims made refuting the existence of global warming. Most of these claims come from looking at very short term data in a very localized region. Global warming, as the name implies, is an increase in the global temperature and conclusions about it cannot be reached using measurements localized in time and space. Doing so is called "cherry picking". Read More... |
2 years 7 weeks ago |