For students enrolled in natural science courses in ETSU's general education core

The journal Science reports the following in the article Kepler-9: A System of Multiple Planets Transiting a Sun-Like Star, Confirmed by Timing Variations — Holman et al., 10.1126/science.1195778 — Science: The Kepler spacecraft is monitoring over 150,000 stars for evidence of planets transiting those stars. We report the detection, based on 7 months of Kepler observations, […]

*August 27, 2010*
by *russellwriter*

The five strongest signals corresponded to planets with Neptune-like masses, between 13 and 25 times that of the Earth. These planets, with orbit periods ranging from six to 600 days, are separated from their star at 0.06 to 1.4 times the distance between the Earth and sun. Dr Lovis added: ”We also have good reasons […]

*August 26, 2010*
by *Michael Garrett*

Interactive tool for practicing comparing two lengths, areas, and volumes. It is VERY TRICKY to judge how area and volume change with size. This tool gives you good practice. Good for physics problems to do with pressure, gravity, and other places where area or volume are important. Explore size estimation in one, two and three dimensions! Multiple levels of difficulty allow for progressive skill improvement.

*August 26, 2010*
by *Michael Garrett*

Interactive tool for showing how derivatives and integrals relate to a graph of a function. Really great for experimenting with the meaning of basic calculus ideas. Intuitive and graphical. Spend a little time playing to see where the derivative is zero, positive, negative, or how the integral grows. Draw a graph of any function and see graphs of its derivative and integral. Don't forget to use the magnify/demagnify controls on the y-axis to adjust the scale.

*August 26, 2010*
by *Michael Garrett*

Interactive tool for fitting a straight line or other curves to data points. Great supplement to any science lab course. Let's you see how data and mathematical models relate to each other. With your mouse, drag data points and their error bars, and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, cubic, or quartic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.

*August 26, 2010*
by *Michael Garrett*

Interactive simulation of vector addition. Let's you practice adding vectors in arrow style to get a feel for the math. Learn how to add vectors. Drag vectors onto a graph, change their length and angle, and sum them together. The magnitude, angle, and components of each vector can be displayed in several formats.

*August 26, 2010*
by *Michael Garrett*

Interactive simulation on graphing 2nd degree polynomials (aka, quadratics). Nicely shows what each coefficient contributes. Learn about graphing polynomials. The shape of the curve changes as the constants are adjusted. View the curves for the individual terms (e.g. y=bx ) to see how they add to generate the polynomial curve. Especially good for constant acceleration problems in physics. These produce 2nd degree polynomials of distance vs time.

August 29, 2010byrussellwriter0